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a solid sphere of radius 3cm is melted and reformed by stretching it into a cylindrical shaped wire of length 9m.find the radius of the wire. |
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Answer» Answer: SPHERE →r=1cm Wire is a CYLINDER Cylinder→H=100cm,r=? Volume of sphere=Volume of wire(cylinder) 3 4
πr s 3
=πr cy 2
h cy
r cy 2
= πh cy
3 4
πr s 3
= 3×h cy
4r s 3
= 3×100cm 4×1×1×1cm 3
= 75 1
cm 2
r cy
= 75 1
= 3
1
cm=0.11cm ∴ RADIUS of the wire=0.11cm. |
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