Physics-
General
Easy
Question
The temperature of the two outer surfaces of a composite slab, consists of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively 
and 
The rate of heat transfer through slab, in a steady state is 
with f equals to
- 1
- ½
- 2/3
- 1/3
The correct answer is: 1/3
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