Q.

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

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a

12 s

b

8 s

c

15 s

d

10 s

answer is D.

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Detailed Solution

Relative velocity of bird with respect to train isVBT=VB+VT=5+10=15ms−1[Because they are going in opposite directions]Time taken by the bird to cross the train is1505=10s
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