Question

1. A train 120 m long is travelling at 72 km/h. How long will it take to cross a. a pole b. a platform 180 m long?​

Answer 1

Answer:

72km/h= 72×5/18=20 m/s

To cross a pole time required= 120÷20= 6 second

For crossing a platform,

Total distance covered= length of train+ length of platform = 120+180= 200m

Time required= 200÷20= 10 second