Bihar Deled Maths Classes 2026 | Bihar Deled Maths Master Class | Bihar Deled Maths By Uday Sir

Added: 2026-05-27

[00:02:39]The voice is coming to everyone The voice is going properly to everyone Good afternoon Good afternoon to everyone How are you Parvati Kumari Varsha Suruchi Sati Golu Ankit Raj Sagar ji Miss Sona Suvarna Mishra Khushboo Preeti Good afternoon to everyone The voice is coming properly Radhe-Radhe I said that if x² - 2x + 1 is divided by x - 1 then the above value is the square of x - 1.

[00:03:18]And when we divide a number and it is completely subtracted, then we ask what would be the remainder in it? Zero. One way is this and the second way is that when we use reminder theorem, if we make the number by which we divide equal to 0, for example x - 1 = 0, then the value of x will be equal to one and if we put the value of this one in the polynomial in this expression, then the result that will come will be called the remainder. This is the rule of reminder theorem. So square of 1 - 2 * 1 + 1 so what is the final result remainder? Zero came.

[00:04:15]Is everyone clear about this? Let's move on to question number two.

[00:04:21]Everyone please share it quickly. Yes.

[00:04:25]Come. The question is asking if there is a quadratic equation and what kind of equation is that? 16x² - 4px + 9 = 0.

[00:04:46]The question is saying that whatever routes will come, that is, it will have two routes. One alpha and one beta.

[00:04:56]So the question is saying that the roots which will be its origin, which will be the values ​​of alpha and beta, those roots should be real and equal.

[00:05:12]So if we assume that there is any quadratic equation and if the value of its root i.e. the value of alpha and beta is equal and if it is real then it can be equal only under one condition, when?

[00:05:30]When the value of b² is equal to 4ac. That is, in the sense of saying, if both the roots of any quadratic equation are equal, then they can be equal only under one condition.

[00:05:46]When it can be equal when the value of b² is equal to 4ac. Ok? So now if we look, who is in place of b and who is in place of a? So in place of a is 16.

[00:06:02]Who is in place of B? So we will say Sir ji is -4p and who is in place of c? So in place of c is 9. If we put it in the expression then the square of -4p is equal to 4 * the value of a is 16 and the value of b is 9. Here if we square it then the value of 16p² will be 4 * 16 * 9 and 16 will be deducted. Two values ​​of p are possible. Two values ​​of p are possible, one +6 and one -6.

[00:06:46]One +6 and one -6. If the value of p becomes +6 and -6 then the roots of this quadratic equation will be r real and also both the roots will be equal.

[00:07:00]The zeros will be the same. Come on, next question number, let me see how many people have good concentration.

[00:07:09]What will be the answer to this question? Please tell me quickly. The question says that the mean of 12 data is 14. Later it was discovered that 24 had been mistakenly written instead of -24.

[00:07:28]What will be the actual mean? First of all there are two ways.

[00:07:35]If we follow the first basic method, then we will say that brother, there are 12 figures and if their mean is 14, then what is the total? 168 168 ok? You have done this. But suppose it suddenly turns out later that you should have put -24 in it. How many? -24 had to be kept.

[00:08:02]Now +24 was placed by mistake. So what do we do about the mistake that happened?

[00:08:11]Minus to improve. And what did we do to the one we wanted to keep? Plused it.

[00:08:18]So if seen indirectly, if 48 is subtracted from 168 then the correct total will be 120. That's why I said how many people's concentration is okay here. So the correct total will be 120. So now we can say that what will be the correct average? If the total number of observations was 120 and the total number of observations was 12, then what would be the correct total average? It will be 10.

[00:08:55]No one's came.

[00:09:01]No one's came. Yes. That's why I immediately tried to see it.

[00:09:08]You can think about it in another way, very easily.

[00:09:13]What is the second method?

[00:09:17]So the second method is that it should be -24.

[00:09:21]In its place, I wrote + 24.

[00:09:26]So this means you have to remove 24.

[00:09:30]This 24th will have to be brought.

[00:09:33]What impact will this have on the entire number 12? So the effect on the number 12 will be that the average will decrease by four. So we can say that the new average or the correct average will be the same as before, so earlier it was 14, four will be reduced from that, so what will be the new average, it will become 10, what will be the new average, 10, see here it is a game of minus, so like there we have to keep -24 because it was correct and +24 has to be removed, so when we subtract it, what will become -24 and -24? -48 will be made. What will become -24 and -24? -48 will be made. Do you understand now? So one thing was to target the total and make it. One thing happened that it was made using the second method. The question says that the price of an item was first increased by 30% and then a discount of 10% was given twice. If I think in a basic way here then I can say that suppose the price of the item was Rs. 100 earlier then it was increased to Rs. 130 by 30% and after that a discount of 10% was given on it. So if I give a discount of 10%, it reduces by ₹13 and will be ₹ 117. Now again if we give a discount of 10%, if we reduce the price by ₹11.70 then it will be sold for ₹15.30.

[00:11:17]So what are the final benefits we can say? 5.3% more than 100 is visible. There is a way.

[00:11:29]What is the other way? You can also make it such that if the price of any item increases by 30% then it increases from 10 to 13.

[00:11:37]How? If it increases by 30% then it becomes 100 to 130.

[00:11:41]If we assume that you subtract 10%, then if you subtract 10% then 10 will become 9. Again if we subtract 10% then 10 will become 9. If we multiply the left side, the original value will be 1000 and if we multiply the right side, then how much did the original value increase, 1053, so how much did it increase, 53 increased, by how much did it increase, by 1000, so how much will it increase in terms of percentage, two zeros will be cut, its answer will be 5.3%, its answer will be 5.3%. You can do it like this also. That means it depends on us how we walk. We will proceed as soon as we get hold of the basic data. Let me read the next question and tell you. What will be the answer? It says that the cost of a wire of length x meters is ₹.

[00:12:42]Which one did you not understand? First increase it by 30%.

[00:12:45]So if you multiply this by 30%, what is 30% of 100? It will be 30, right? So it increased to 130. Then 10% of 130 is 13.

[00:12:58]Discount was given by reducing.

[00:13:02]Will sell it for 117, will reduce it again by 10% of 117. So obviously it will reduce the price by ₹11.70 and sell it for ₹15.30.

[00:13:10]And here it was increased by 30%. This means if 3/10 increases, it will become 13 from 10.

[00:13:19]Here if you subtract any value by 10% then it will decrease by 1/10, so 10 will become 9 and if you decrease any value again by 10% then 10/9 will multiply the initial. This will be the old value and this will finally be the new value. it became clear? Yes, absolutely make it from whatever you understand. The cost of x metres of wire is ₹. So if I ask you to tell me the price of 1 meter wire, what will you say? If the cost of x meter wire is ₹ then what will we say is the cost of 1 meter wire? Everyone please share it once.

[00:13:57]Ok? Then what will be the length of y meter wire? So multiply by y will be. So the answer will be yd/x yd/ x which will be the answer? yd / x I made a mistake in this too. Ok.

[00:14:20]Let's look at this question. You are repeatedly appearing in the exam. Was in yesterday's set also. It was there before this also.

[00:14:29]How to remove it? Distance formula will be used here.

[00:14:35]And what is the distance formula? I have told you many times. So today you can go directly to the application. So what does the distance formula say? y2 - y1 / x2 - x1 then who is in place of y2? Isn't it? y2 - y1 squared so y - -3 squared now + x2 - x1 so this is 10 and that is 2 so 10 - 2 times squared I said that there is no tension in the order. Well, if it had a square root, I would have written 10 instead of it and would have squared it. Now did you understand the story? Yes. Do you understand the story now? Now tell me one thing.

[00:15:34]This is my y + 3 squared. If this goes 64 out of 100 then it will be 36. How?

[00:15:45]Square of 8 is 64. If we subtract 64 from 100, we get 36.

[00:15:49]So now we have to understand why there are two answers for y + 3? If I bring it here, it will become a square of 6. So one will become a + b and one will become a - b and this is what I told you yesterday.

[00:16:14]So one factor is y + 9 and one factor is y - 3, so the value of y will be -9 and 3.

[00:16:27]Whatever is after here, you can avoid it and if you want, you can also remove the option from here. There is one more way which I am telling you.

[00:16:42]Listen carefully. If I square it with y + 3, will the square root of 36 be +6 and -6 or not?

[00:16:54]If we remove its square then it will be +6 and -6.

[00:16:59]So now tell me what will be the value of y?

[00:17:02]+ -6 and -3, then when 3 is subtracted from +6, the result is 3 and when -3 is subtracted from -6, the result is -9. It depends on what understanding you have. It will become clear the way you proceed. Is this clear? There is no confusion. Did you understand? That means which formula did we use? You would normally use it like this.

[00:17:30]Using y2 - y1.

[00:17:37]Now using the distance formula, the square of x + x2 - x1 is equal to: 10 k. So if we square both sides, we would get the same data.

[00:17:50]Is everyone clear till here now?

[00:17:52]Raja, it is clear till here Anjali Jha, what do you want to understand son, please message me, what do you want to understand, your question should be very clear son, what do we have to understand in this quickly, till here it is clear to everyone, if we talk about distance formula, then what do we know, suppose if there are two points x1 and y1, okay, one is a point and what is a point point? x2 and y2.

[00:18:24]If the distance between these two points has to be found, what is the value of the distance formula? You tell me. You will say that Sir, the value of ab is under root. Many of you put x first. It doesn't matter.

[00:18:43]Everything becomes positive after coming into the square.

[00:18:46]So x2 - x1 squared + y2 - y1 squared.

[00:18:53]One concept to always remember. Secondly, the slope of these two points is also asked in the exam.

[00:19:00]Always remember this shield.

[00:19:04]y2 - y1 / x2 - x1 Third one asks find the mid point, what will be the coordinate of the mid point? So you will say Sir, the coordinate of x1 + x2/2 x and the coordinate of y1 + y2 / 2 y form one and the same but that is called equation of line. If he comes forward then we will definitely discuss it. For example, if the equation of a line has to be made, then the equation of the line can also be made with the help of these two points.

[00:19:45]If you have already done the equation of lines, then what happens in such a case? y - y1 = m * x - x1 This will not come in your D.El.Ed. Or the same thing can be written like this y - y1 = y2 - y1 / x2 - x1 * x - x1 These are called equations of lines.

[00:20:22]We have also told about the equations and slopes of lines, it is called slope.

[00:20:25]Therefore, my children, you have to attend regular discussions.

[00:20:27]Ok? Things have to be fixed gradually. Tell me which triangle is this and in which the distance formula will be used the most. Tell me quickly.

[00:20:52]Distance formula is used the most in this.

[00:20:55]Like in the question, let us assume that a triangle is given to us. Ok?

[00:21:02]This triangle has three full taxes. The value of corner one is 06. Some things, not everything, have to be written. Some things have to be done mentally.

[00:21:13]That will make your work easier. For example, what is the value of b?

[00:21:23]What is the value of -5 3 and c? 3 1 So if the side of the triangle is decided then we can easily say what kind of triangle it is? So first of all, let's say I have to find the length of this side.

[00:21:37]So what formula will be used for this? Using the same formula x2 - x1, we will subtract 5 from 3. If you subtract 5 from 3, it becomes 8.

[00:21:54]If we subtract 3 from minus minus plus and 1, the square of -2 will become the square of +2. That means the square of +2 will become 4. So this will come to you. Please understand carefully. It will come to 68.

[00:22:08]What will you say about 68? 2 will say 17.

[00:22:12]Like again, what if I were to find the distance between two points by y2 - y1? One is the square of 3.

[00:22:23]3 out of 100 becomes 3 and one becomes the square of 5.

[00:22:26]So this would be how much would be the under root, 25 and 9 34, just like we calculate the distance formula, same to same, well if we calculate it here then what will happen y2 - y1, so one from 6 is the square of 5, now what would be the square of -3, +9, so 9 25 34, now tell me one thing, this is yours, this is yours, 34 and this is yours, 2 17, which triangle is being formed, yes, which triangle is being formed, someone will tell me by commenting, which triangle is being formed, yes, very easy, very good, which triangle is being formed, the triangle whose two sides are equal, that is, an isosceles triangle is being formed, when does it become equilateral? When all the arms become beans. Which formula should I use? Same y2 - y1 square and x2 - x1 square and instead of writing here you have to do mental calculation and pay a little attention to plus minus.

[00:23:44]Ok? And remember it completely.

[00:23:48]I am saying this again that when I am analyzing the previous year questions, it means that whatever pattern the questions will come in future should be clearly visible to me. Now suppose this is the question. Do n't make any mistake in a hurry. Tell me quickly what is it? is saying that the base of a triangle is 15 decimeters and its height is 12 decimeters.

[00:24:18]What will be the height of another triangle having twice the area? Whereas its base is 20 decimeters.

[00:24:24]How much will it be? Please comment quickly and tell me. Is everyone getting this much? Everyone please like it.

[00:24:34]Our morale increases. I teach so well. If still there is anything missing then you must do one thing that yes, I will give you time to make notes.

[00:24:44]Its board PDF is also uploaded.

[00:24:46]Okay, right? So what should you do to him? At least revise thoroughly every day.

[00:24:53]Yes.

[00:24:57]Some children are getting D, some are getting B. First of all, one thing to always keep in mind is to read the question carefully.

[00:25:07]So first of all, what is the area of ​​a triangle? 1/2 * base * height. The question is saying that this area is double the area of ​​a new triangle.

[00:25:24]What will be the height of that triangle? So the area of ​​that triangle is 1/2 the base is given by 20. You are being asked about his height. That means the new triangle is double the area of ​​this triangle. Now tell us one thing if I tell you that this value and this value got cut.

[00:25:48]I would say 5 * 4K is 20. 5 * 3 = 15. And if we subtract it from four, 4 * 3 becomes 12. So only those whose score is 18 are correct. So the answer will be 18 decimeters.

[00:26:11]This is available on the Telegram channel of Career Will Bihar. Apart from that, you will probably also be pinned in the comments. She will go on that.

[00:26:16]Yes, I understand that those who got 18, theirs is absolutely correct.

[00:26:25]Come on, tell me what will be the answer to the next question.

[00:26:28]Now we have discussed it a lot and see how much benefit it is. We have discussed it again and again, we have done everything like parallel, intersect, coincide, so what is the question telling us that we have a linear equation in two variables, given 2x - 3y - 2, the value of which is 0, then what is the second one given, 4x - 4y - 5 = 0, so what do we do first? Let's check.

[00:27:05]What do you do? Let's check.

[00:27:07]So what is the coefficient of x?

[00:27:11]What is the coefficient of 2/4 y? -3/-4 and the constant is -2/-5 now tell me this is 1/2.

[00:27:24]This is 3/4 of mine and this is 2/5. When the first one is not equal then there is no need to check further. Therefore, it will have a unique solution and the line will be intersecting.

[00:27:43]Going perfectly. And when would it become parallel? When these are equal and these are not equal.

[00:27:49]And when does it become coincident? When all three become equal. Are you getting any benefit now or not? Tell me honestly. Let's take the next question.

[00:28:00]What is the next question given? The next question given is that what will be the point at which the graph of 2x - 3y = 6 will intersect the y axis? You can make it in two ways.

[00:28:19]I will define both of them for you.

[00:28:22]Make it with whatever feels right to you. The first equation of the line you have is 2x - 3y = 6. And remember what I said?

[00:28:35]Needed on the y axis. So the value of x on the y axis is 0, my brother. If you want a point on the y axis, what does that mean for x? It is 0.

[00:28:51]So when we put the value of x as 0 in it, then it becomes 2 * 0 - 3y = 6, so this becomes 0. So the value of y would be -2.

[00:29:06]What would be the value of y? -2 The value of x on the y axis is 0, so the answer will be 0 -2.

[00:29:20]What would happen on the y axis [sound of clearing throat]? 0 will become -2. Either its sign will have to be changed or else if it is given as positive then do one thing. Here you just do a minus sign.

[00:29:30]What will happen if you minus this? The value of x on the y axis will become 0.

[00:29:40]What will be the value of y when the value of x becomes 0? +2 will come. Then we can denote it like this. Let me explain the second method.

[00:29:48]Look carefully. When any equation, any linear equation in two variables, is given like 2x - 3y = -6, now that you have corrected it, divide both by -6.

[00:30:01]With this you will not need to work hard further. Ok? And this is yours - what will happen to the 3y dividend now? -6 equals this forest will be formed. That means you create a forest and cut it into two. So what appeared under the x? -3 appeared. What appeared under the x? What will appear below -3 and y? +2 will appear. What came out of this? This shows that it will intersect the x axis at -3. The value of y at that place will be 0. What is the meaning of this? will intersect the y axis at two. The value of x at that place will be zero. That is, the sense of saying is on the x axis and on the y axis. If we make it like this, then we will put the value of x as 0 on the y axis and the answer of y as zero on the x axis.

[00:30:59]Is this clear now? Any doubt? Dilip Kumar please speak. Is there any doubt? Now [sound of clearing throat] yes, exactly. Does anyone have any doubts? And I told you a trick that if you want it on the x axis then keep the value of y as 0 and if you want it on the y axis then keep the value of x as zero. Let's look at the next question.

[00:31:23]Bihar Police Inspector, if you belong to Bihar and have given Bihar D.El.Ed, then a batch of ours is coming from 2nd June which is available for Rs.399 and we have a class of two to ten hours daily on Career Will Bihar, so those who want to do good arithmetic can do it, read this question first, those who have read it, whose concentration was good in reading, those who will not make any mistake, their answer will come in one go and those who will make mistakes in reading will not be able to get the answer. There will be trouble.

[00:31:57]So first of all what is the question saying? He is saying that the abscissa of 4x - 3y is something you should keep in mind.

[00:32:10]When we make a graph, we call the x axis the abscissa.

[00:32:20]What do you say? The abscissa and y are called the ordinate.

[00:32:26]What is y called? Category.

[00:32:30]In English it is called Aashasa.

[00:32:36]Absa says.

[00:32:40]Please check the spelling once. C happens to one. Do n't take tension. And this is called ordinate. The ordinate is one, avsi a b double si c avsa is one, the ordinate is one, so the question here is saying carefully that its abscissa means its abscissa, abscissa means the value of x, this value of x is the mean of the first five natural numbers, now tell me one thing, tell me what will be the first five natural numbers? 1 2 3 4 5 and if there are five consecutive numbers and they are in ascending order then the number right in the middle will be three.

[00:33:34]So this will be called its mean. Please understand carefully. It is the mean of the first five natural numbers.

[00:33:42]And if you remember, I also asked in class to find the median. And the ordinate, which is the ordinate, means the value of y is the median of the first five whole numbers.

[00:33:54]If you remember what this means, what will the value of y depend on? 0 1 2 3 and 4 and this number in the middle, right in the middle, I had said in the previous class also that if you arrange in ascending order, if you arrange in ascending order, then the number coming right in the middle is the median and I have told many things in this sixth discussion itself.

[00:34:23]So now this number right in the middle here is the median and where does the whole number start? It starts from zero. So the question is telling you that the abscissa is x i.e. three and the ordinate is two. Now put this in and tell me what will be the answer? So the value of 4 * x is 3 - the value of 3 * y is 2, so the answer will be 4 * 3 = 12 minus six. Those who got six have read it correctly. And you have read the question correctly.

[00:35:05]Yes sir.

[00:35:13]Ok? The mean is called the central value.

[00:35:17]When several consecutive numbers are given, the mean is exactly in the middle. But the median has a slight twist.

[00:35:24]After arranging them in ascending order, the one which comes exactly in the middle is called median.

[00:35:29]Let us explain this question.

[00:35:33]What are you saying? It is saying that the mean weight of 21 students is 21 kg. If a boy weighing 21 kg is removed from it, what will be the average weight of the group after removal? Ranjeet Sharma When something does not happen at once, it should be checked again and again.

[00:35:50]You have to do it.

[00:35:53]Whether it is by crying or laughing, it is better to work hard.

[00:35:56]So slowly slowly let us assume that if 25 questions come, then if we can solve even 20 out of 25 by listening to them again and again, then your work will be done. First of all we will understand the question that there are total 21 students. How many students are there brother?

[00:36:14]21 and the average of these 21 students is 21. So the total weight of the children will be 441.

[00:36:26]What did you do with it? A 20-year-old student was removed from his 21-year-old position. So now you tell me what is the total? 420 So when one student leaves, what will be the number of children now? 20. So what will be the average of those 20 children? So we will say sir, the average will be 21. We will cut 20 to 21 kg. There is a way. The second method is that I have discussed it today in the class. What is the other way?

[00:37:04]So the second way is that if 21 students are removed, then due to the removal of 21 students, the average weight on 21 students is still 21 kg. So it is obvious that what will be the total weight figure?

[00:37:24]Only 21 kg will remain. Because here, when 21 kilos are removed, the average effect on everyone will be of one kilo only. So it's not going to make any difference.

[00:37:37]Now come to the next one quickly. This came up in the discussion yesterday as well. If you remember, one or two children had also commented. I dealt with it in a very simple way. Will you tell me what will happen?

[00:37:53]Pavitra Mukesh Nidhi Sharma Khushi Kiran Praveen Royal Rocky Pratima Kumari Khushboo Kumari Varsha Good afternoon to everyone son, yes what will happen, please tell me quickly what is he saying in the question, if you understand it with the help of a funda then it will be understood very easily, for example, suppose there was a fan worth ₹1500. Ok? The first discount given was 20%. So, subtract 20% i.e. ₹300 from the marked price written on it. So this means we will sell it for ₹100.

[00:38:38]But what happened? Yes Prince, tell me what happened? Again another discount was given and it was sold for Rs 1104.

[00:38:49]This means that from here again ₹96 was released and it was released at ₹12000.

[00:38:58]So if there is a discount of ₹96 on ₹12000, then what will this discount be equal to in percentage? will be equal to 8%. What percent will it be equal to? will be equal to 8%. We will be equal to 8%. Even this is absolutely clear.

[00:39:19]And the other way to do it was that you have MRP of ₹1500. If you discount someone by 20%, you will sell it at 80%.

[00:39:34]Again how much discount should be given? So we do n't know how much discount to give next?

[00:39:40]So let's say d2 sold 100 equals 1104 in B. The difference in this method is that it depends on you how you are carrying out the calculations. Like two zeros one two two zeros got cut. One more zero was deducted. Three zeros were crossed out.

[00:40:02]Look carefully. 15 * 8 = 120. So one zero will be cut from 120. You cut it as per your wish. Now 12 * 8 = 96 12 * 9 = 108 12 * 2 = 24 so how much will you subtract from 100 to get D2. So what percentage was the second discount, i.e. 8%? Was 8%.

[00:40:27]What was the second discount? Was 8%. There is no time left for the exam. No no, there was time earlier also.

[00:40:34]Now we are directly discussing 15 days 15 marathons so that maximum benefit can be taken from one experience and I am sure that all of you who are taking the class regularly, you can be absolutely rest assured, you can see my last five discussions and you will get 10 more discussions in future, after adding the total, keep the questions safe, I will come for discussion, I will tell you after analysis, if you don't get it then write lots of abuses in the comments, Radhe-Radhe. Ok?

[00:41:06]Otherwise, if you do not understand something in one go, then again earphones and YouTube are your asset. If you listen to it repeatedly with earphones in your ears, you will benefit. First of all understand one thing. If any amount of money doubles in 5 years, it means that I lent ₹1 to someone and that person returned ₹2 to me.

[00:41:35]If someone is saying that it gets tripled.

[00:41:38]This means that he gave a loan of ₹1 and returned ₹3. But all the money that was to be returned was not yours. How much was your money? ₹1 was only interest. What is the interest on increasing ₹1 to ₹2?

[00:41:58]How much interest do you have to earn on ₹1 and in the second scenario?

[00:42:01]Obviously ₹2, now you tell me and think like this, how many years do you have to wait to earn ₹1?

[00:42:08]5 years is obvious, if you want to earn double the money then how many years will you have to wait? 10 years old. So whenever there will be a question based on doubling, tripling, eightfold, you can prepare mentally like this.

[00:42:23]So what will be the answer? After 10 years this money will triple. Are you getting the point now? Let's quickly answer this question.

[00:42:39]Look at today's class, that is why I am saying that when you look at things with full concentration, you will see them.

[00:42:49]You will see things how I have explained them. Look, in today's class I have also written the formula for mid point on the board.

[00:42:57]I wrote of the slope.

[00:43:01]I wrote its plus equation of line.

[00:43:03]If we take advantage of this, we can easily answer here immediately.

[00:43:10]What are you saying? Find the midpoint. So what will be the mid point? The x coordinate is four in the first one and six in the second one, so x1 + x2/2 and the y coordinate is five in the first one and five in the second one, so a + b / 2, so 10/2 becomes five and this becomes five, this means that the midpoint joining both the lines is 5 5, that is, the value of x is five, the value of y is five, yes yes good. Come on, very beautiful. Let us answer this question. Let's see how many people come quickly. Quickly, what's the matter? The question says that this is the midpoint of A and B, so whose value do you have to find?

[00:44:36]Look here, actually there is no confusion. In this y and y + 4 were written. If b + 4 is written in it then there is no confusion. There is no need to worry. Then the value of y will be or in Hindi if you say b will be.

[00:44:51]Ok? So there is no confusion in this.

[00:44:54]Now you tell me, if we want to find the value of b in the mid point, then in the first one it is b and in the second one it is b + 4 or if we use y then it is y + 4 and right now we have written just the formula of mid point. If we add both and divide by two, what point will it be equal to? It will be equal to a forest here. So it will become two. So the value of 2b + 4 is 2, so 2 out of 4 is 2, so -2, those whose answer was made in English medium, their y will be equal to -1 and those who made it in Hindi medium, their b = -1 will be.

[00:45:37]Yes, what's the matter? Very nice Sir, when you tell me, then actually it is going on on the basis of the preparations that you people have done in advance, so there is no problem, Rajak. But what can we do after hearing it twice or thrice? Can fix things.

[00:45:54]Well, this is icing on the cake.

[00:46:01]What are you saying? One angle is 4x.

[00:46:05]This is icing on the cake. No one should miss this.

[00:46:10]This angle is 4x.

[00:46:14]This angle is 2x.

[00:46:18]And this angle is 3x. And the sum of the three angles of a triangle is 180. So the value of 9x is 180, then what is the value of x?

[00:46:34]I am giving this confidence to those who are bad in Maths that when you go to give the exam, we as teachers will not throw the question paper of the exam on you, that brother, we have so much knowledge, that is why this is what is asked, what happens in this exam that someone 's English gets messed up. Someone's Hindi gets messed up. Someone's reasoning goes wrong. So all this together creates a balance in the exam. The exam is not such that it is a complete mess. I asked each question from here and there.

[00:47:05]Let me see the answer to this question.

[00:47:08]So many people? So many people?

[00:47:12]Praveen Narayan. Ok, good. I will get it done immediately.

[00:47:14]Understood the question, just the previous one with b + b + 4. Okay, please tell me this carefully.

[00:47:23]We are fine. Find the diameter of that circle.

[00:47:29]Find the diameter of the circle whose area is equal to the sum of the areas of two circles having the same area. Well, I want to see how many people get the answer correctly.

[00:47:40]We [laughs] no no I try.

[00:47:48]Always keep one thing in mind for me that I do not consider myself to be experimental, like Doctor Dang. I try to ensure that whatever is real and genuine should be there. When you go to the exam, you should feel the same as you do when you attend daily classes. Only then the exam goes very smoothly and we will meet again after 8th. Yes, what is the question saying? The first one is saying that the area of ​​the first triangle will be the square of π * 24. The area of ​​the second triangle will be the square of π * 7 and if the areas of both are added, it will be equal to π * r². So if you take pi as common then it will be cut and it will become triplet of 7 24 25 or if you square it then you will get 625. So my child the radius will be 25 and he is asking us the diameter, so what did I tell those who read it, there should be no mistake, the diameter will be 50 for all, it is coming very beautiful, so the diameter which will be the value of 2r which is called diameter will be 50, now I understand the matter, yes, let's go, Bihar Police Constable will also start from 2nd June in 299. Whatever the child wants to do, you people are D.El.Ed. students, right?

[00:49:19]Come on, tell me quickly. So how many people are answering this question? OK np. Don't make any mistake at all. There is no need to panic at all.

[00:49:29]Tell me what will be its area? is saying the area of ​​the square that is inscribed in a circle of radius 8 cm. The square is inscribed in the circle. Like this circle. There is a square in this circle. So be careful, the figure itself is the answer to half the question. Now tell me one thing. If the centre is here, then when we join it from here to here, it will work as the radius and if we join it from here to here, it will also work as the radius and this entire thing from here to here, what will it work for us, let me straighten it a little, otherwise it works as the diagonal, so if the sides of the square are a and a, then what will this entire length be equal to? will be equal to 2a. will be equal to 2a. Ok? Now the question is asking to find the area of ​​a square whose radius is 8 cm, so tell me if this is eight then this is also eight, so 8 is 16, so the value of 2a is equal to 16, then what will be the value of a, 16/2 and everyone knows that the area of ​​a square is a², so if we square 16 then it will be 256 and if we square 2 then it will be two. So the correct answer to this will be 128. What is the matter. There will be 128 very beautiful ones.

[00:51:13]Very nice, keep everyone's concentration level maintained like this gradually. It will be very useful. Those whose D has come, son, are wrong. Let's ask this question, what will happen?

[00:51:27]What will happen to this question? It's saying radius 6 centimeters and height 10 centimeters. To empty a liquid from a cylindrical bottle, a diameter of 2 cm is required. Radius and height 3.6 cm. This much bottle will be required. So we all know what is the volume of the vessel in which the liquid is kept? Pi r² h this is the volume of your cylinder in which this liquid is kept and the question is asking what will be the number of bottles in which it is being emptied, we do not know, let's assume n and this is a cone, then what will be the volume of the cone, the value of 1/3 * Pi * r is the square of 2 and the value of h is 3.6 what is the value of h, three 3.6, just what will it be? The first one will be pie and pie cut.

[00:52:35]Look now, don't hurry, be careful, this is 3.6, so if you divide it by 10, this decimal will be removed and 36 and 36 will be subtracted. If 2 * 2 = 4 then this will be subtracted five times from 2 * 2 = 4 and this will also be subtracted five times. So the value of n will be 75.

[00:52:57]This means you can cut it as per your requirement.

[00:53:01]What is the value of n? 75 has arrived. Yes, C for cockroach. Very beautiful. Let go. Ok. So let's conclude today's meeting here. It's about to be 1:00.

[00:53:12]Then your next class will start.

[00:53:14]Love you all. Take care.

[00:53:17]Keep drinking plenty of water in summer.

[00:53:19]Avoid dehydration. And I am saying again that at whatever level I am trying to take you, you can be sure that it will be good for you in the exam. Now let's come to the question that a child had a doubt with me regarding this question.

[00:53:34]So look, I have this x coordinate. This is the x coordinate.

[00:53:41]So if we add both of them and divide by two, this will become the midpoint. So like this is b and this is b + 4. So I said b now when we divide the sum of b + 4 by two then this should be my midpoint and what will the midpoint be equal to? will equal one.

[00:54:03]So if I cross multiply, 2b + 4 = 2. So the value of 2b will be -2 so the value of b will be -1. Okay, love you all.

[00:54:14]Bye-by take care and do share.

[00:54:18]It is your duty to like, share and subscribe.

[00:54:20]Good day. Take care.