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Steam at 280°C flows in a stainless steel pipe (k = 15.2 W/m °C) whose inner and outer diameters are A cm and B cm, respectively. The pipe is covered with C cm thick glass wool insulation (k = 0.038 W/m °C). Heat is lost to the surroundings at 6°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of 15 W/m2 °C. Taking the heat transfer coefficient inside the pipe to be 80 W/m2 °C, determine the rate of heat loss from the steam per unit length of the pipe. Your answer should be given in Watts.