Question

# A bird is sitting on train A moving towards East with a velocity 300 km/hr. Another train B of same speed is moving in West direction on the same track. When the trains are 6 km apart, the bird starts flying with a velocity 30 km/hr with respect to ground towards B. After touching B, it returns back to A and continue repeating this process until the trains collide. In this process, the total distance traveled by the bird is:

A
100 m
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B
200 m
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C
300 m
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D
6 km
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Solution

## The correct option is C 300 mRelative velocity between trains: 600mkh−1Time taken for crash is:t=dv=6600=1100hours=36sVelocity of bird =30kmh−1=30∗518ms−1Distance traveled by bird is =30∗518∗36=300mHence option C is the answer.

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