SSC CPO SI and ASI 2013 Paper

Question : 110 of 200

Marks: +1, -0

A copper sphere of diameter 18 cm is drawn into a wire of diameter 4 mm. The length of the wire, in metre, is

Solution:

(2) Given, radius of the sphere = 9 cm
Volume of sphere

= 4/ 3πr^3

= {4}/{3} ×\π ×9 ×9× 9=972 \π{cm}^{3}

Let the length of wire be m cm, then

972 \π=\π×(0.2)^{2} × m

m=24300 c m=243 m

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