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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. |
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Answer» Volume of a sphere = \(\frac{4}{3}\)πr3 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. ⇒ \(\frac{4}{3}\)π x 93 = π x r2 x 10800 ⇒ r = 0.6 cm |
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