A copper wire, 3 mm in diameter, is wound about a cylinder whose length is 12 cm, and diameter
Channel: Doubtnut
Date: 2020-07-05

A copper wire, 3 mm in diameter, is wound about a cylinder whose length is 12 cm, and diameter 10 cm, so as to cover the curved surface of the cylinder. Find the length and mass of the wire, assuming the density of copper to be `8. 88g p e r\ cm^3`