The diameter of a copper sphere is 9 cm is melted and drawn into a long wire of uniform cross section. If the length of the wire is 54 cm ,find its diameter
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R of sphere =9/2cm
l of wire =54 cm
Vol. of wire = Vol.of sphere
pie r×r×l=4/3pie R×R×R
r×r×54=4/3×9/2×9/2×9/2
r×r×54=3×9×9/2
r×r=2×2/3×3
r=2/3cm
l of wire =54 cm
Vol. of wire = Vol.of sphere
pie r×r×l=4/3pie R×R×R
r×r×54=4/3×9/2×9/2×9/2
r×r×54=3×9×9/2
r×r=2×2/3×3
r=2/3cm
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