An ice chest whose outer dimensions are 30 cm x 40 cm x 40 cm is made of 3-cm-thick Styrofoam (k = 0.033 W/m-C). Initially, the chest is filled with 28 kg of ice at 0C, and the inner surface temperature of the ice chest can be taken to be 0C at all times. The heat of fusion of ice at 0C is 333.7 kJ/kg, and the surrounding ambient air is at 25C. Disregarding any heat transfer from the 40 cm x 40 m base of the ice chest, determine how long it will take for the ice in the chest to melt completely if the outer surfaces of the ice chest are at 8C. Answer: 22.9 days D = 25C Ice chest 0C D O C Styrofoam --3 cm