Multiple choice

A 350 m long train, running at a speed of 36 km/h, crosses a railway platform in 40 sec. Find the ratio of the length of the platform to the length of the train.

  1. 7 : 5

  2. 7 : 8

  3. 1 : 5

  4. 1 : 7

  5. 2 : 7

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

Speed = 36 km/h = 10 m/s. Distance = speed * time = 10 * 40 = 400 m. Total distance = train length + platform length = 350 + P = 400. So P = 50 m. Ratio P:T = 50:350 = 1:7.