A steel pipe with 5-cm is covered with a 6.4-mm asbestos insulation [k =0.166 W/m °C] followed by a 2.5-cm layer of fiberglass insulation [k=0.0485 W/m °C]. The pipe-wall temperature is 315°C, and the outside insulation temperature is 38 °C. Calculate the interface temperature between the asbestos and fiberglass. [286.7 °C] A hot steam pipe having an inside surface temperature of 250 °C has an inside diameter of 8 cm and a wall thickness of 5.5 mm. It is covered with a 9-cm layer of insulation having k -0.5 W/m °C, followed by a 4-cm layer of insulation having k -0.25W/m °C. The outside temperature of the insulation is 20 °C. Calculate the heat lost per meter of length. Assume k-47 W/m C for the pipe. [196.2 W/m]