173. An aluminum pan whose thermal conductivity is 237 W/m-°C has a flat bottom whose

diameter is 20 cm and thickness of 0.4 cm. Heat is transferred steadily to boiling water in the

pan through its bottom at a rate of 500 watts. If the inner surface of the bottom of the pan is

105°C, determine the temperature of the surface of the bottom of the pan.

A. 95.27°C B. 105.27°C

C. 115.27°C D. 125.27°C