A rectangular copper fin has one end maintained at 200°C, while remainder of the fin surface is exposed to convective environment at 25°C with h = 35 W/m 2 .K. If the thermal conductivity of the...

A rectangular copper fin has one end maintained at 200°C, while remainder of the fin surface is exposed to convective environment at 25°C with h = 35 W/m².K. If the thermal conductivity of the copper is 386 W/m.K, determine the heat lost by fin per unit depth. The length of the fin is 5 cm and thickness is 4 mm. Assume the fin tip to be insulated.