Given,
Volume of brass wire = 2.2 dm3 = 2200 cm3
Diameter of cylindrical wire = 0.25 cm
Radius of wire = \(\frac{0.25}{2}\) = 0.125 cm
Let length of wire = h cm
so,
= πr2h = 2200
= h = \(\frac{(2200\times 7)}{22\times 0.125\times 0.125}\) = 44800 cm = 448 m