A steel pipe with 5-cm OD is covered with a 6.4-mm asbestos insulation [k = 0.096 Btu/h · ft · ◦F] followed by a 2.5-cm layer of fiberglass insulation [k = 0.028 Btu/h · ft · ◦F]. The pipe-wall temperature is 315◦C, and the outside insulation temperature is 38◦C. Calculate the interface temperature between the asbestos and fiberglass

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