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Grade: 11

                        

A train 150 m in length is going northwards at a speed of 10 m/s. A parrot flies at a speed of 5 m/s southwards, parallel to the railway track. What is the time taken by the parrot to cross the train?

2 years ago

Answers : (1)

Khimraj
3007 Points
							
use concept of relative velocity
relative velocity = 5 – (-10) = 15m/s
relative displacement = 150
then time t = 150/15 = 10 sec
Hope it clears.
2 years ago
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