Question

A train running at a speed of 45km/h is 400m long.how long will it take to pass a vendor standing on the station platform?h

Answer 1

length of the train=400. Speed=45km/h. Km/h to m/h=5/18. So (400*18)/45*5= 32 sec

Answer 2

To pass a vendor standing on the platform the train must travel 400m.

45km=45000m/3660 sec=12.5m/sec

the train travels 12.5 m in 1 sec

∴, the train travels 400m in =1/12.5×400= 32 sec.