Question

A train a crosses a stationary train b in 50 seconds and a pole in 20 seconds with the same speed the lenght of train b in meters is

Answer 1

Answer: 30*speed of the train.

Explanation:

Let X be speed of the train

Train A crossing a pole in 20 sec

Length of train A = 20* X

For crossing train B the time taken is 50 seconds.

Length of (A+B) = X *50

Length of train B = 50X - 20X

= 30X.