Hot air at a temperature of 60C is flowing through a steel pipe of 10 cm diameter. The pipe is covered with two layers of different insulating materials of thicknesses 5 cm and 3 cm, and their corresponding thermal conductivities are 0:23 and 0:37 W/mK. The inside and outside heat transfer coefficients are 58 and 12 W/m^2K. The atmosphere is at 25C. Find the rate of heat loss from a 50 m length of pipe. Neglect the resistance of the steel pipe and neglect radiation. To solve this problem, draw a schematic diagram, clearly define different symbols for the different diameters (radii), show these in your schematic diagram, define symbols for the conductivity, the heat transfer coefficients (inside and outside), the temperatures inside and outside etc. Write down all equations necessary for this in a symbolic fashion. Finally substitute the values and find the heat transfer rate. please I need the answer with some explanation.