A slab of stone of area 0.36 m2 and thickness 10 cm is exposed on the lower surface to steam at 100°C. A block of ice at 0°C rests on the upper surface of the slab. In one hour, 4.8 kg of ice is melted. Calculate the thermal conductivity of the stone.
Ans: 1.244 watt m-1k-1
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