Question

If length of a train is 400 meter it crosses a boy who is standing on a platform in 16 second. Find the speed of train (in km/hr) (a) 45 (b) 90 (c) 180 (d) 135

Answer 1

Speed = Distance / Time
= 400/16
= 25m/s

To convert from m/s to km/hr we multiply the value by 18/5

Speed = 25×18/5
= 18 × 5
= 90km/hr.

option (b)

Hope this helps.

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