The left face of a one dimensional slab of thickness 0.2 m is maintained at 80&#

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The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

Options:

A . 77.2

B . 71.2

C . 63.8

D . 48.7

Answer: Option D
Answer: (d).48.7

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