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

Question

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

Options:

A . 4800 W

B . 336 W

C . 1.33 W

D . 0.75 W

Answer: Option B
:
B
Work done by man = Heat absorbed by ice = mL = 60

\times

80 = 4800 calorie = 20160 J

∴ P o w e r = \frac{W}{t} = \frac{20160}{60} = 336 W

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