Multiple choice

A train 270 m long is moving at a speed of 25 km/hr. How much time it will take to cross a man coming form the opposite direction at a speed of 2 km/hr in -

  1. 28 sec.

  2. 24 sec

  3. 32 sec.

  4. 36 sec.

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

Relative speed when moving in opposite directions = 25 + 2 = 27 km/hr = 27 × (5/18) = 7.5 m/s. The train must cover its own length of 270 m to completely pass the man. Time = Distance/Speed = 270/7.5 = 36 seconds.