Pr.4 A hot steam pipe (k = 47 W/m.K) having an inside surface temperature of 250C 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 20C. a) Draw a clear schematic b) Calculate the heat lost per meter of length