A stainless steel tube (ks = 19 W/mK) of 2 cm ID and 5 cm OD is insulated with 3 cm thick asbestos (ka = 0.2 W/mK). If the temperature difference between the inner most and outermost surfaces is 600 C, the heat transfer rate per unit length is

A stainless steel tube (ks = 19 W/mK) of 2 cm ID and 5 cm OD is insula

1.	A stainless steel tube (ks = 19 W/mK) of 2 cm ID and 5 cm OD is insulated with 3 cm thick asbestos (ka = 0.2 W/mK). If the temperature difference between the inner most and outermost surfaces is 600 C, the heat transfer rate per unit length is
A.	0.94 W/m
B.	9.44 W/m
C.	944.72 W/m
D.	9447.21 W/m
Answer» D. 9447.21 W/m

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A stainless steel tube (ks = 19 W/mK) of 2 cm ID and 5 cm OD is insulated with 3 cm thick asbestos (ka = 0.2 W/mK). If the temperature difference between the inner most and outermost surfaces is 600 C, the heat transfer rate per unit length is

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