Physics - Heat & Thermo Question with Solution | TestHub

Two cylindrical rods A and B made of different materials, are joined in a straight line. The ratio of lengths, radii and thermal conductivities of these rods are :
$\frac{{\mathrm{L}}_{\mathrm{A}}}{{\mathrm{L}}_{\mathrm{B}}}=\frac{1}{2},\frac{{\mathrm{r}}_{\mathrm{A}}}{{\mathrm{r}}_{\mathrm{B}}}=2$ and $\frac{{\mathrm{K}}_{\mathrm{A}}}{{\mathrm{K}}_{\mathrm{B}}}=\frac{1}{2}$. The free ends of rods A and B are maintained at $400\mathrm{K},200\mathrm{K}$, respectively. The temperature of rods interface is ________ K, when equilibrium is established.