Multiple choice

A train passes a platform 90 metre long in 30 seconds and a man standing on the platform in 15 seconds. The speed of the train is :

  1. 12.4 kmph

  2. 14.6 kmph

  3. 18.4 kmph

  4. 21.6 kmph
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Train passes a man in 15 seconds, so its own length = 15 × speed. Train passes platform in 30 seconds, so train + platform = 30 × speed. Therefore platform = 15 × speed, meaning speed = 90/15 = 6 m/s = 21.6 kmph.

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