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Question

Latent heat of ice is 80 calorie/gm. A man melts 60 g of ice by chewing in 1 minute. His power is

A
4800 W
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B
336 W
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C
1.33 W
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D
0.75 W
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Solution

The correct option is B 336 W
Work done by man = Heat absorbed by ice = mL = 60 × 80 = 4800 calorie = 20160 J
Power=Wt=2016060=336W

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