An ice cube of dimensions 60 cm x 50 cm x 20 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 3.4 x 10 5 J kg -1 and thermal conducting of insulation wall is 0.05 Wm -1 0 C -1 )
Text Solution
Verified by ExpertsThe correct answer is:
B
= 2(0.3 + 0.1 + 0.12)
= 2(0.4 + 0.12)
=2(0.52)
=1.04m 2
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