Question

A train 100m long is to cross a river bridge of length 800m. What time will it take to cross the bridge

Answer 1

it will be 2.2seconds.

Answer 2

Total distance required for the train to cross the bridge is,

d = (100 + 800) m = 900 m

Let the speed of the train be v.

Hence the time taken to cross the bridge is,

t = (900 / v) s.