Multiple choice

A train crosses a pole in ‘n’ seconds and a platform which is 60% longer than train in 13 seconds. If the length of the platform is 120 meters, find the value of n?

  1. 6

  2. 8

  3. 5

  4. 4

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

Platform length = 120m. Platform is 60% longer than train, so train length = 120/1.6 = 75m. Train crosses platform in 13 seconds, so speed = (75+120)/13 = 195/13 = 15 m/s. Time to cross pole n = train length / speed = 75/15 = 5 seconds.