5 cm thick walls of a box like cooler is made of plastic foam Its total surface area is 1 5 m If outside temperature is 30 C

Question

5 cm thick walls of a box like cooler is made of plastic foam Its total surface area is 1 5 m If outside temperature is 30 C then how much ice melts each hours inside the cooler to hold its temperature at 0 C Given L for plastic 0 04 W mK Lo 1 kcal 4 184 kJ kcal 80 cal g and

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