A circumferential fin of rectangular profile surrounds a 2-cm-diameter tube. The length of the fin is 5 mm, and the thickness is 2.5 mm. The fin is constructed of mild steel. If air blows over the fin so that a heat-transfer coefficient of 25 W/m2 ∙ ºC is experienced and the temperatures of the base and air are 260 and 93ºC, respectively, calculate the heat transfer from the fin.