JEE Main 2022 Physics question
An ice cube of dimensions 60 cm cm cm is placed in an insulation box of wall thickness 1 cm. The box keeping the ice cube at 0°C of temperature is brought to a room of temperature 40°C. The rate of melting of ice is approximately: (Latent heat of fusion of ice is J and thermal conducting of insulation wall is 0.05 )
Answer: (2)
Solution
The heat conducted through the walls is and it melts ice at the rate . The surface area is $A =
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