An infinite long fin of 30 mm diameter and k = 150 W/mK has a base temperature of 180°C. If the connective heat transfer coefficient is 20 W/m2K and the ambient temperature is 24°C, then the heat loss is (\(\sqrt {0.02025} = 0.14\))
1
64.76 W
2
69.7 W
3
54 W
4
58 W