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Q3-As shown in the figure. Four circumferential fins of aluminum triangular profile are installed on a 10-cm-diameter tube maintained at 100C. The fins have a length of 8 cm and thickness of 2 cm. The fins are exposed to a convection environment at 20C with h = 80 W/mC. Calculate the heat lost by the fins expressed in watts per unit length of the pipe. Da onete ca