AP ICET 2017 Shift 1 Paper

Question : 105 of 200

Marks: +1, -0

A solid copper sphere of radius 3 cms is melted to make a wire of diameter 0.2 cms. The length of wire is

Solution:

In such cases, volume remains constant.
Volume of cylindrical wire = Volume of sphere

πr^{2}l={4}/{3}πR^{3}⇒l={4}/{3}{R^{3}}/{r^{2}}={4}/{3}×{3^{3}}/{(0.1)^{2}}

⇒l=4×9×100=3600cm=36m.

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