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A man carries a load of 50 kg to a height of 40 m in 25s. If the power of the man is 1568W, the mass of the man is,

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20 kg

100 kg

75 kg

50 kg

answer is B.

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Detailed Solution

$P = \frac{(M + m) gh}{t} \Rightarrow 1568 = \frac{(M + 50) \times 9.8 \times 40}{25}$
M = 50 kg

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