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Three identical cubical boxes each of side 100cm are filled with ice at 0 0 C. The are closed on all sides and stacked one over the other inside a large hall with air temperature of 30 0 C. All the walls are of same thickness [0.3cm]. IF 300gm of ice melts each second in the middle box, the thermal conductivity of material of the box is [assume latent heat of ice=3.33 X 10 5 J/Kg] ?


Three identical cubical boxes each of side 100cm are filled with ice at 00C. The are closed on all sides and stacked one over the other inside a large hall with air temperature of 300C. All the walls are of same thickness [0.3cm]. IF 300gm of ice melts each second in the middle box, the thermal conductivity of material of the box is [assume latent heat of ice=3.33 X 105J/Kg] ?


Grade:11

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