A train of 150 m length is going towards North direction at a speed of $10 \mathrm{~m} / \mathrm{s}$

Question

A train of 150 m length is going towards North direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. A parrot flies at the speed of $5 \mathrm{~m} / \mathrm{s}$ towards South direction parallel to the railways track. The time taken by the parrot to cross the train is

Professor PC Thomas Classes · Answer

Relative speed $= 10 + 5 = 15 	ext{ m/s}$. Time $= \frac{	ext{Distance}}{	ext{Speed}} = \frac{150}{15} = 10 	ext{ s}$.