An ice box used for keeping eatables cool has a total wall area of 1m² and a wall thickness of 5.0cm….

Q: An ice box used for keeping eatables cool has a total wall area of 1m² and a wall thickness of 5.0cm. The thermal conductivity of the ice box is K = 0.01 J/m°C. It is filled with large amount of ice at 0°C along with eatables on a day when the temperature is 30°C. The latent heat of fusion of ice is 334 × 10³ J/kg. The amount of ice melted in one day is (1 day = 86,400s)

(a) 776 g

(b) 7760 g

(c) 11520 g

(d) 1552 g

Ans: (d)

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