Question

A train is 100m long and is moving with a speed of 72km/h.The time taken by the train to cross a pole in the station

Answer 1

72 km/ h
72×1000/3600 m/sec
72×5/18
20m/ sec
now time= 100/20
5Second

Answer 2

THE SPEED OF TRAIN IN M/S WOULD BE
$72 \times 5 \div 18 = 20$
The length of train is 100m and speed is 20m/s

So the time taken to cross a pole would be
$100 \div 20$
$= 5sec$
This is the answer