A 100 meters long train is running at a speed of 90 km per hour. It will cross a railway platform 200 m long in-

Question: A 100 meters long train is running at a speed of 90 km per hour. It will cross a railway platform 200 m long in-

Solution:
Here,
Speed of the running train = 90 km/hr
= {90 × (5/18)} m/sec
= 25 m/sec

And length of the train is = 100 metres
Length of platform = 200 m

So, the time will taken by the train = (Length of train + Length of platform)/Speed
= (100 + 200)/25
= 300/25
= 12 sec