Engineering :: Heat Transfer

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The rate of heat loss through a furnace wall is 1000 kcal per hour when inside temperature is 1000?C and outside wall temperature is 500?C. What should be the wall thickness in case the thermal conductivity of wall material is 0.5 kcal/m-hr?C

[A].	12.5 cm	[B].	25 cm
[C].	40 cm	[D].	50 cm
[E].	60 cm

Answer: Option B

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