A furnace wall is constructed with an inner layer of 25cm of fire brick, middle layer of 8cm insulating brick and outer layer of 15cm red brick. The inner surface is 1598 °F and the outer surfaces is 104 °F. k values in W/m k = fire brick 1.0 insulating brick 0.12 red brick 0.75 Solve for the rate of heat loss per m² per hr. and the interface temperatures. Answer must be in SI unit.

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