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The radius of a copper shpere is 12 cm...

The radius of a copper shpere is 12 cm. The sphere is melted and drawn into a long wire of uniform circular cross-section. If the length of the wire is 144 cm , the radius of wire is :

A

1 cm

B

2 cm

C

4 cm

D

none of these

Text Solution

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The correct Answer is:
C
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