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Q.

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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a

20 kg

b

100 kg

c

75 kg

d

50 kg

answer is B.

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Detailed Solution

P=(M+m)ght⇒1568=(M+50)× 9.8× 4025
M = 50 kg

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