A rod of thermal conductivity, 300 W/mK, 1.4 cm in dia. Connects two plates 20 cm apart maintained at 343 K. what is the center temperature of the rod, if air at 293 K passes over the rod. (h = 50 W/m2K) (cos n 0.7 = 1.25)
1
51.8°C
2
53.4°C
3
59.8°C
4
56.2°C