Question

A train of 150 m length is going towards north direction at a speed of 10 ms-1. A parrot flies at a speed of 5 ms-1 towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to:

Answer 1

@sak.shahbaz welcome to openstudy
now
speed of the train is 10 ms-1 in north
and
A parrot flies at a speed of 5 ms-1 towards south
so relative speed=10-(-5)=10+5=15 ms-1
so time taken=150/15=10 sec

Answer 2

got this?

Answer 3

thanks very much dear

Answer 4

no pro :)