Figure shows a copper rod joined to a steel rod. The rods have equal length and and the equal

Figure shows a copper rod joined to a steel rod. The rods have equal length and and the equal cross sectional area. The free end of the copper rod is kept at `0^(@)C` and that of the steel rod is kept at `100^(@)C` . Find the temperature at the junction of the rods. conductivity of copper `=390WM^(-1)`^(@)C^(-1)` and that of steel `=46Wm^(-1)`(@)C^(-1)` .