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Figure shows a copper rod joined to a st...

Figure shows a copper rod joined to a steel rod. The rods have equal length and 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 `theta` at the junction of the rods. Conductivity of copper
`=390 W//m-^@C` and that of steel `= 46 W//m-^@C`.
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