Multiple Choice
A sphere of radius 40 cm is lagged to a radius of 50 cm. The temperatures of outer and inner surfaces are 66°C and 235°C respectively. Thermal conductivity of logging per cm thickness is 0.7 kcal/m-hr°C. The rate of heat leakage will be
A) 500 kcal/hr
B) 1.49 kcal/hr
C) 666 kcal/hr
D) 298 kcal/hr
E) 398 kcal/hr
Correct Answer:
Verified
Correct Answer:
Verified
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