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Two walls of thickness in the ratio 1:3 ...

Two walls of thickness in the ratio 1:3 and thermal conductivities in the ratio 3:2 form a composite wall of a building. If the free surfaces of the wall be at temperatures `30^@C` and `20^@C`, respectively, what is the temperature of the interface?

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To solve the problem, we will follow these steps: ### Step 1: Define the Parameters Let: - Thickness of wall 1 = \( L \) - Thickness of wall 2 = \( 3L \) - Thermal conductivity of wall 1 = \( 3k \) - Thermal conductivity of wall 2 = \( 2k \) ...
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