Multiple choice

A train crosses a pole in 5 seconds and a platform, which is 60% longer than the length of the train, in 13 seconds. If the length of the platform is 160m, what is the speed of the train?

  1. 12 m/s

  2. 16 m/s

  3. 20 m/s

  4. 23 m/s

  5. 25 m/s

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the train crosses a pole, it covers its own length. Taking 5 seconds means speed = length/5. The platform is 160m, which is 60% longer than the train, so the train is 100m. Speed = 100/5 = 20 m/s.