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Physics-

General

Easy

Question

A train of $150 blank m$ length is going towards north direction at a speed of $10 m divided by s e c$ . A parrot flies at the speed of $5 blank m divided by s e c$ towards south direction parallel to the railway track. The time taken by the parrot to cross the train is

$12 s e c$
$8 s e c$
$15 s e c$
$10 s e c$

The correct answer is: $10 blank s e c$

Relative velocity
$equals 10 plus 5 equals 15 blank m divided by s e c$
$therefore t equals fraction numerator 150 over denominator 15 end fraction equals 10 blank s e c$

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