A composite slab has two layers having thermal conductivities in the ratio of 1:

Question

A composite slab has two layers having thermal conductivities in the ratio of 1:2. If thickness is same for each layer then the equivalent thermal conductivity of the slab would be

Options:

A . 1/3

B . 2/3

C . 2

D . 4/3

Answer: Option D
Answer: (d).4/3

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