Q65 of 189 Page 512

The diameter of a sphere is 6 cm. It is melted and drawn into a wire of diameter 2 mm. The length of the wire is

Radius of the sphere = 3 cm


Volume of a sphere




On recasting a sphere into cylinder wire, the volume will remain same


Volume of a cylinder


1cm=10mm


⇒ 2mm =0.2cm


Radius = 0.1 cm





(∵ 1m =100 cm)

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