Physics - Heat & Thermo Question with Solution | TestHub

Three bars each of area of cross-section $A$ and length $L$ are connected in series as shown in the figure. The thermal conductivities of their materials are $K$, $2K$ and $1.5K$. If the temperatures of the free end of the first and the last bar are $200^{\circ }$C and $18^{\circ }$C, the value of ${\theta }_1$ and ${\theta }_2$ are (in steady state):