Question

$\text{The diameter of a sphere is 6 cm.It is melted and drawn into a wire of diameter 2 mm.The length of the wire is}\left(a\right)12m\left(b\right)18m\left(c\right)36m\left(d\right)66m$

Answer 1

(c)36m

2mm=0.2cm
Radius=$\frac{6}{2}$=3

Volume of wire will equal to volume of sphere therefore
Volume of wire=πr*2h
h=36 m