Calculate the heat transfer per unit length (standard SI units, W/m) through a metal pipe with a 40-mm-thick insulation layer surrounding the pipe. The inside diameter of the pipe is 20 mm and the outside diameter is 22 mm. The temperature inside the pipe is 95 C and the exterior temperature is 20 C. Thermal conductivity for the metal is 285 W/(m*K) and for the insulation 0.05 W/(m*K). Assume that heat is transferred by conduction only.