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The radius of a metallic sphere is 9 cm. It was melted to make a wire of diameter 4mm. Find the length of the wire.

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The radius of a metallic sphere is 9 cm. It was melted to make a wire of diameter 4mm. Find the length of the wire.

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Given: For metallic sphere, 

radius (R) = 9 cm 

For the cylindrical wire, 

diameter (d) = 4 mm 

To find: Length of wire (h).

∴ The length of the wire is 243 m.

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