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A circumferential fin of rectangular profile is constructed of a material having k = 55 W/m-oC and is installed on a tube having a diameter of 3 cm. The length of the fin is 3 cm and the thickness is 2 mm. If the fin is exposed to a convection environment at 20oC with a convection coefficient of 68 W/m2-oC and the tube wall temperature is 100oC, calculate the heat lost by the fin.
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