A $150\, m$ long train is moving to north at a speed of $10 \,m/s$. A parrot flying towards south with a speed of $5\, m/s$ crosses the train. The time taken by the parrot the cross to train would be........$s$
A $150\, m$ long train is moving to north at a speed of $10 \,m/s$. A parrot flying towards south with a speed of $5\, m/s$ crosses the train. The time taken by the parrot the cross to train would be........$s$
$30$
$15$
$8$
$10$
A $150\, m$ long train is moving to north at a speed of $10 \,m/s$. A parrot flying towards south with a speed of $5\, m/s$ crosses the train. The time taken by the parrot the cross to train would be........$s$
Relative velocity of parrot with respect to train = $5 - ( - 10) = 5 + 10 = 15\,m/\sec $
Time taken by the parrot$ = \,\frac{d}{{{v_{{\rm{rel}}{\rm{.}}}}}} = \frac{{150}}{{15}} = 10\,\sec .$
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