A copper solid cylinder of radius 14 cm and height 10cm is meter and recast into cylindrical wire of diameter 4mm.find the length of

copper wire?

1 answer

Convert cm to mm by multiplying by 10.

V = πr^2h = π * 140^2 * 100 = π * 19600 * 100 = 1,960,000π

1,960,000π = π2^2h = π4h

Solve for h = length