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A wire of length 1m and radius 1mm is su...

A wire of length 1m and radius 1mm is subjected to a load. The extension is 'x'. The wire is melted and then drawn into a wire of square cross-section of side 1mm. What is its extension under the same load?

A

`pi^2 x `

B

`pi x^2`

C

`pi x `

D

`pi//x `

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The correct Answer is:
A
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