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The lower surface of a slab of stone of face-area 3600 cm and thickness 10 cm is exposed to steam at 100C. A block

The lower surface of a slab of stone of face-area 3600 cm and thickness 10 cm is exposed to steam at 100C. A block of ice at 0C rests on the upper surface of the slab. 4.8 g of ice melts in one hour. Calculate the thermal conductivity of the stone. Latent heat of fusion of ice = 3.36 10 J kg .

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