Multiple choice

A 250 metres long train crosses a platform in 39 seconds while it crosses a signal pole in 15 seconds. What is the length of the platform?

  1. 450 m.

  2. 400 m.

  3. 350 m.

  4. 300 m.

  5. 500 m.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Train length = 250 m. Time to cross pole = 15 seconds (train covers its length). Speed = 250/15 m/s. Time to cross platform = 39 seconds (train covers platform length + train length). Distance = (250/15) × 39 = 650 m. Platform length = 650 - 250 = 400 m. Option A (450 m) is incorrect as it doesn't account for the train's length properly.

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