Steam at 200°c flows in a 1 meter cast iron pipe (k 80 w/m"c) whose inner and outer diameters are d1 0.20 m and d2 0.22 m. the pipe is exposed to room air at 25°c. the heat transfer coefficients at the inner and outer surfaces of the pipe are 75 and 20 w/m2 "c, respectively. the pipe is to be covered with 3.4 cm of glass wool insulation (k = 0.05 w/m·°c). determine the rate of heat loss (w) from the pipe.