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A cylinder of radius R made of material of thermal conductivity K1 is surrounded by a cylindrical shell of inner radius R and outer radius 2R made of a material of thermal conductivity K2 . the 2 ends of the combined system are maintained at 2 different tamperatures . there is no loss of heat across the cylindrical surface and the system is in steady state. the effective thermal conductivity of the system is 1 \lbrack K1+K2\rbrack 2 \lbrack K1+3K2\rbrack/4 3 K1K2/ K1+K2 4 \lbrack3K1+K2\rbrack/4

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99996115750-0-0

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