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The difference in lengths of brass and a...

The difference in lengths of brass and aluminium rods at all temperature is `2xx10^(-3)`m. If `alpha` for brass is `18xx10^(-6)" "^(0)C^(-1)` and for aluminium is `20xx10^(-6)" "^(0)C^(-1)`. Calculate their lengths at `0^(0)C`?

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The correct Answer is:
18 cm and 20 cm
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