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The temperature of the two outer surface...

The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x, respectively, are `T_2 and T_1(T_1gtT_1)`. The rate of heat transfer through the slab, in a steady state is `((A(T_2-T_1)K)/2)f`, with f equal to

A

1

B

`(1)/(2)`

C

`(2)/(3)`

D

`(1)/(3)`

Text Solution

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The correct Answer is:
D
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