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The weight of a person is 60 kg . If he ...

The weight of a person is `60` kg . If he gets `10` calories of heat through food and the efficiency of his body is `28%`, then upto what height he can climb? Take g = `10m s^(-2)`

A

`100` cm

B

`1.96` cm

C

`400` cm

D

`1000` cm

Text Solution

Verified by Experts

The correct Answer is:
B

Amount of energy utilised in climbing mgh = `0.28 xx10xx4.2`
` implies h = (0.28xx10xx4.2)/(60xx10) = 1.96 xx 10^(-2)m = 1.96`cm
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ALLEN -GEOMETRICAL OPTICS-EXERCISE -01
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