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Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. C respectively are joined together.


Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. C respectively are joined together. The temperature outside of A and C are 30C and 100C respectively. The interface between B and C will be at a temperature of __________ C.

A.40
B.95
C70
D.50

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