A thick spherical shell has two equally thick layers with conductivities for inner and outer layers nk and k respectively. If the interface temperature is arithmetic mean of inner and outer surface temperature of composite shell then value of n is (Assume inner radius R and other radius 2R for composite layer)

A thick spherical shell has two equally thick layers with conductiviti

1.	A thick spherical shell has two equally thick layers with conductivities for inner and outer layers nk and k respectively. If the interface temperature is arithmetic mean of inner and outer surface temperature of composite shell then value of n is (Assume inner radius R and other radius 2R for composite layer)
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