QUESTION 4: A thick-walled tube of stainless steel with $20 mm$ inner diameter and $40 mm$ outer diameter is covered with a $30 mm$ layer of asbestos insulation $(k = 0.2 W / m^{?} C)$ . If the inside wall temperature of the pipe is maintained at $60 0^{?} C$ and the outside insulation at $100 0^{?} C$ , calculate the heat loss per meter of length.

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QUESTION 4: A thick-walled tube of stainless steel with

20 mm

inner diameter and

40 mm

outer diameter is covered with a

30 mm

layer of asbestos insulation

(k = 0.2 W / m^{?} C)

. If the inside wall temperature of the pipe is maintained at

60 0^{?} C

and the outside insulation at

100 0^{?} C

, calculate the heat loss per meter of length.

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