Question

a train 280 M long is running at a speed of 42 kilometre per hour how much time will it take to pass a man standing on a platform give answer in a paper

Answer 1

The train is running at a speed of 42 kmph. So the distance covered by train in meters per second is:

42*(5/18)=35/3 m/sec

Now the time required to the train to cross a man of is the same amount of time that train will take to cross itself that is 280 m.

So 280*(3/35) = 24 seconds.

Simply awesome!!

Answer 2

Answer will be 24 sec

see the attachment.

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