The speed of a train is 20 km/hr. Length of the train is 450 metres. How much time (in minutes) the train will take to cross a man standing on the platform?
Show answer & explanation
Correct answer: C
Explanation
Speed = 20 km/h
= 20 × 5/18
= 50/9 m/s
Time = Distance / Speed
= 450 / (50/9)
= 81 seconds
= 81 / 60
= 27/20