One end of a copper rod of length 1.0 m and area of cross-section 10-3 m2 is immersed in boiling water and the other end in ice. If the coefficient of thermal conductivity of copper is 92 cal/m-s-C0 and the latent heat of ice is 8 x 104 cal/kg, then the amount of ice which will melt in one minute is:

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9.2 x 10-3 kg

8 x 103 kg

6.9 x 10-3 kg

11.5×10-5 kg

answer is D.

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