The interior of an oven is maintained at a temperature of 850 degree Celsius by

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The interior of an oven is maintained at a temperature of 850 degree Celsius by means of a suitable control apparatus. The oven walls are 500 mm thick and are fabricated from a material of thermal conductivity 0.3 W/m degree. For an outside wall temperature of 250 degree Celsius, workout the resistance to heat flow

Options:

A . 0.667 degree/W

B . 1.667 degree/W

C . 2.667 degree/W

D . 3.667 degree/W

Answer: Option B
Answer: (b).1.667 degree/W

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