Two Metal Rods,one Silver and the Other Copper,are Both Immersed

Multiple Choice

Two metal rods,one silver and the other copper,are both immersed at one end in a steam chamber at a temperature of 100°C.The other end of each one is in an ice water bath at 0°C.The rods are 5.0 cm long and have a square cross-section that is 2.0 cm on a side.No heat is exchanged between the rods and the surroundings,except at the ends.How much total heat flows through the two rods each minute? The thermal conductivity of silver is 417 W/m ∙ K,and that of copper is 395 W/m ∙ K.

A) 20 kJ
B) 39 kJ
C) 47 kJ
D) 49 kJ
E) 11 kJ