A slab consists of two parallel layers of copper and brass of the same – McqOptions

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1.	A slab consists of two parallel layers of copper and brass of the same thickness and having thermal conductivities in the ratio 1 : 4. If the free face of brass is at \[{{35}^{o}}C\] and that of copper at \[1:\sqrt{2.5}\], the temperature of interface is [IIT 1981; MP PMT 1987, 2001]
A.	80°C
B.	20°C
C.	60°C
D.	40°C
Answer» B. 20°C

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