Problems on Trains Quick Tips & Tricks to Solve

追加: 2026-05-27

[00:00:00]Okay, let's dive into this explainer and solve a classic high-speed math mystery together. So, a 60 km/h train crosses a pole in just 9 seconds. How long is it?

[00:00:08]Right, we've got two vital clues to crack this case, our speed and our time.

[00:00:12]But wait, spot the trap. We've got kilometers per hour clashing directly with seconds. You absolutely cannot multiply hours by seconds. That's exactly why we've got to convert first.

[00:00:22]It's simple. Multiply 60 by 5 over 18.

[00:00:24]That simplifies to 50 over 3 m/s. Now, this safe converted speed is the totally solid foundation we need for our math.

[00:00:31]The crucial next step, we apply our core linear motion formula using those newly aligned units.

[00:00:36]So, we just multiply 50 over 3 by our time of 9 seconds. Let's see. The source gives four possible answers, 120, 180, 324, or 150 m. Any guesses? The math brilliantly reveals the definitive length of our train. It's exactly 150 m.

[00:00:52]Always stay vigilant, guys. What other tricky unit traps might be hiding in your everyday math?