Physics - Heat & Thermo Question with Solution | TestHub

Two rods $P$ and $Q$ of equal size are joined end to end and well lagged. The free end of $P$ is at $20^{\circ }$C and the free end of $Q$ is at $120^{\circ }$C. The conductivity of $P$ is three times that of $Q$. Find the steady-state temperature of the joint in ${}^{\circ }$C.