Question

Steam at 120°C is continuously passed through a 50cm long rubber tube of inner and outer radii 1.0cm and 1.2cm. The room temperature is 30°C. Calculate the rate of heat flow through the walls of the tube. Thermal conductivity of rubber = 0.15J/m-s—°C.

Answer 1

Given
K_rubber = 0.15J/m-s-°C 

T₂ - T₁ = 90°C

We know for radial conduction in a Cylinder