The Thermal Conductivity of Aluminum Is Twice That of Brass

Multiple Choice

The thermal conductivity of aluminum is twice that of brass.Two rods (one aluminum and the other brass) of the same length and cross-sectional area are joined together end to end.The free end of the brass rod is maintained at 0°C and the free end of the aluminum rod is maintained at 200°C.If no heat escapes from the sides of the rods,what is the temperature at the place where the two rods are joined together?

A) 76°C
B) 133°C
C) 148°C
D) 155°C