A copper wire of Iength 36 m and diameter 2 mm is melted

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A copper wire of Iength 36 m and diameter 2 mm is melted to form a sphere. The radius of the sphere (in cm) is

Volume of the wire = πr²h = π × 0.1 × 0.1 × 3600 cm³
= 36π cm³

Volume of solid sphere =	4	πR³ = 36π
	3

⇒ R³ =	36 × 3	= 27
	4

∴R = ³√27 = 3 cm