Multiple choice

A train crosses a 100 m long platform in 14 seconds and crosses a man standing on the platform in 10 seconds. Find the speed of the train.

  1. 45 km/hr.

  2. 40 km/hr.

  3. 25 km/hr.

  4. 30 km/hr.

  5. 90 km/hr.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

To find the speed: Let train length = L meters and speed = v m/s. Crossing a 100m platform in 14s means L + 100 = 14v. Crossing a man (train length only) in 10s means L = 10v. Substituting: 10v + 100 = 14v, so 4v = 100, v = 25 m/s. Convert to km/hr: 25 × (18/5) = 90 km/hr. This matches option E.

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