Question

The diameter of a copper sphere is 18cm. the sphere is melted and is drawn into a long wire of uniform circular cross section if the length of the wire is 108m the diameter of the wire is

Answer 1

here the volume of copper sphere =volume of wire.
according to question
first we find volume of sphere and then volume of wire.
Then put both into equation .
after this we will find radius and multiply it by 2 we will find diameter

Answer 2

hey mate here is ur answer

volume of sphere = volume of wire
4/3 π r^3 = π r^2 h
4×18×18×18 / 3×2×2×2 = r^2 × 1080000
r^2 = 4×3×9×9/1080000
r^2 = 972 / 1080000
r = √ 0.09
r = 0.3
so d = 0.6

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