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NEET 2013 · Power

Power question from NEET 2013

Q38NEET 2013Easy

Power

One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio

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Answer: (d)

Both do the same work $mgh$ , so $P = \dfrac{mgh}{t} \propto \dfrac{1}{t}$ .
$\dfrac{P_1}{P_2} = \dfrac{t_2}{t_1} = \dfrac{30}{60} = \dfrac{1}{2}$
So the answer is (d) $1:2$ .

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