# Find the length o

Given,

Weight of copper wire = 13.2 kg = (13.2×1000) gm

Diameter of wire = 4mm

Weight of 1 cm3 wire = 8.4 gm

Let length of wire = h cm

So, volume ×8.4 = 13.2×1000

= πr2h×8.4 = 13.2×1000

=

= h =

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