A) \[{{28}^{o}}C\]
B) \[{{14}^{o}}C\]
C) \[{{7}^{o}}C\]
D) \[{{5}^{o}}C\]
Correct Answer: D
Solution :
In the steady state, rate of heat across each layer of the wall is the same \[\frac{{{K}_{A}}A(\Delta T)}{10}=\frac{{{K}_{B}}A(35-\Delta T)}{20}\] using \[{{K}_{A}}=3{{K}_{B}}\] we get \[\Delta T={{5}^{o}}C\]You need to login to perform this action.
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