Find the length of 13.2 kg of copper wire of diameter 4 mm, when 1 cubic cm of copper weighs 8.4 gm.

Given,

weight of copper wire = 13.2 kg

Diameter of wire = 4 mm

Radius of wire =

Let length of wire = h cm

so,

weight of 1 cubic cm wire = 8.4 gm

=

=