WBCS.LIVE practice question

A train A of length 180 m, running by 72 km/h to cross the another train B which is running in the opposite direction at speed of 108 km/h and length 120 m, in how much time?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 23 s
  2. 12 s
  3. 6 s
  4. 30 s

Correct answer and explanation

Correct answer: 6 s

Explanation: āœ… Correct Answer: C) 6 s šŸ“š Explanation: Relative speed = 72 + 108 = 180 km/h = 180 Ɨ (5/18) = 50 m/s. Total distance to cover = 180 + 120 = 300 m. Time = Distance Ć· Speed = 300 Ć· 50 = 6 seconds.