Q3] A hot steam pipe (k=5W/m.C) with an inner diameter of 10cm and a wall thickness of 6mm is covered with a 5cm thick layer of insulation (k=0.2W/m.C) that followed by 3cm layer of another insulation (k=0.4W/m. C). If the inside temperature of the pipe is maintained at 300C and the outside temperature is 40C, determine the heat flow through the pipe for 1.0m length and the interface temperature between the pipe surface and the insulation