A train travelling at 72 km per hour crosses a person standing on the platform in 20 seconds

A train travelling at 72 km per hour crosses a person standing on the platform in 20 seconds, What is the length of the train?

  1. 720 metres
  2. 400 metres
  3. 360 metres
  4. 300 metres
Anurag Mishra Professor Asked on 30th April 2016 in Maths.
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1 Answer(s)

Answer: (2) 400 metres 

Solution:-
The speed of the travelling train = 72 km/hr
Speed in m/sec = 72 x 5/18 
 = 20 m/sec 
Time taken by train to cover a person who standing on the platform = 20 sec 

Then, the length of the train = 20 x 20 
 = 400 metres 

Hence, the correct answer is option (2) 400 metres. 

Anurag Mishra Professor Answered on 1st May 2016.
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