Q.

The rate of heat flow from a 50 mm thick wall of material having thermal conductivity of 40 W/m?C for a temperature difference of 10?C will be

A. 80000 kcal/m2 hr
B. 800 kcal/m2 hr
C. 2000 kcal/m2 hr
D. 8000 kcal/m2 hr
E. 80 kcal/m2 hr
Answer» A. 80000 kcal/m2 hr
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