Steam at 150°C fl ows inside a pipe that has an inside radius of 50 mm and an outside radius of 55 mm. The convective heat-transfer coeffi cient between the steam and the inside pipe wall is 2500 W/(m 2 °C). The outside surface of the pipe is exposed to ambient air at 20°C with a convective heat-transfer coeffi cient of 10 W/(m 2 °C). Assuming steady state and no heat generation, calculate the rate of heat transfer per meter from the steam to the air across the pipe. Assume thermal conductivity of stainless steel is 15 W/(m °C.)