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An iron rod and a copper rod lie side by...

An iron rod and a copper rod lie side by side. An the temperature is changed, the difference in the length of the rods remains constant at a value of 10 cm. Find the lengths at `0^o C`. Coefficients of linear expansion of iron and copper are `1.1 xx 10^(-5) C^(-1) and 1.7 xx 10^(-5) C^(-1)` respectively.

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