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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 thermal conductivity K and 2K and thicknesses x and 4x, respectively are `T_(2)` and `T_(1)(T_(2)gtT_(1))`. The rate of heat of heat transfer through the slab, in ? steady state is `[(A(T_(2)-T_(1))/(x)]f`, with f equal to :-

A

1

B

`1//2`

C

`2//5`

D

`1//5`

Text Solution

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The correct Answer is:
C
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