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A wall has two layers A and B of equal a...

A wall has two layers A and B of equal areas. Their thicknesses are 10 cm and 20cm. Conductivity of A is twice that of B. Under thermal equilibrium, if the temperature difference across the wall is `45^(@)`C, then temperature difference across the layer A is

A

`36^(@)`C

B

`27^(@)C`

C

`18^(@)`C

D

`9^(@)`

Text Solution

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The correct Answer is:
D
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