A cylindrical pin fin of diameter 1 cm and length 5 cm with negligible heat loss from the tip has an effectiveness of 15. If the fin base temperature is 280°C, the environment temperature is 20°C, and the heat transfer coefficient is 65 W/m2.°C, the rate of heat loss from this fin is
(a) 20 W
(b) 48 W
(c) 156 W
(d) 398 W
(e) 418 W
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