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The diameter of a metallic sphere is 6cm...

The diameter of a metallic sphere is 6cm. The sphere is melted and drawn into a wire of uniform cross-section. If the length of the wire is 36m, find its radius.

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The wire is in shape of a cylinder.
Since thr sphere is melted and cylinder wire is formed, their volumes are equal.
Volume of sphere =`4/3 pi r^3`
as diameter of sphere s `6` cm, so radius be `3` cm.
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