11.Two rods of different metals are in contact as shown in the figure. The left end of the Cu rod is in contact with a hot reservoir at 500 K and the right end of the Ag rod is in contact 0.2 m with a cold reservoir at 150 K. The thermal conductivity for Cu and Ag are 400 W/m-K and 300 W/m-K, respectively. The length of each metal is 0.2 m and the cross section of the metal rods is 0.001 m². After a while, the temperature everywhere no longer changes with time. What is the temperature at the interface of Cu and Au?

(A) 325 K
(B) 328.57 K
(C) 345. 68 K
(D) 350 К
(E)366.67 Κ