Question

A cylindrical tube of diameter 3 m and length 20 m is lined with 3 cm of insulating
material of conductivity 4.2 x 104 J/cm°C. It is maintained at 20°C, although the outer
temperature is - 30°C. What is the rate of heating required to maintain the inner
temperature - [Take In(51/50) = 0.0206]
Ri
20°C
-30°C
R2​

Answer 1

Answer:

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