A train 250 meters long is running at a speed of 90 km/h. How long will it take to cross a platform 150 meters long?

Question: A train 250 meters long is running at a speed of 90 km/h. How long will it take to cross a platform 150 meters long?

Solution:
speed = 90 km/h = 90 × (5/18) m/s
= 25 m/s

To cross the platform have to travel = (250 + 150) m
= 400 m

∴ Required time = 400/25 seconds
= 16 seconds