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Consider a compound slab consisting of t...

Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is . . . . . .. .

A

`sqrt(2K)`

B

3K

C

`4/3K`

D

`2/3K`

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The correct Answer is:
C
For answer see Section - E Q. no. 5
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