Physics - Heat & Thermo Question with Solution | TestHub

Rods $X$ (length 40 cm) and $Y$ (length 20 cm) of equal area are joined end to end and lagged. The free end of $X$ is at $90^{\circ }$C and the free end of $Y$ at $0^{\circ }$C. The junction is at $40^{\circ }$C. Find $\frac{{\lambda }_X}{{\lambda }_Y}$ (two decimals).