The diameter of a copper sphere is 18 cm. The sphere is melted and is drawn into a long wire of uniform circular cross-section. If the length of the wire is 108 m, find its diameter.
Volume of a sphere = (4/3)πr3
Volume of a cylinder = πr2h
Given, diameter of a copper sphere is 18 cm. The sphere is melted and is drawn into a long wire of uniform circular cross-section. The length of the wire is 108 m.
Long wire can be assumed to be a cylinder.
⇒ r = 0.6 cm
16