Question

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?
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


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