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Que. A rod of 3 cm diameter and 20 cm length is maintained at 100 degree Celsius at one end and 10 degree Celsius at the other end. These temperature conditions are attained when there is heat flow rate of 6 W. If cylindrical surface of the rod is completely insulated, determine the thermal conductivity of the rod material
a. 21.87 W/m degree
b. 20.87 W/m degree
c. 19.87 W/m degree
d. 18.87 W/m degree
Correct Answer:18.87 W/m degree
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