If 3.96 cubic dm of lead is to be drawn in to a cylindrical wire of diameter 0.6 cm, then the length of the wire (in metres), is:

140 m

Diameter of cylindrical wire = .6cm 

We know that,

Volume of cylinder = πR²H

We also know that,

1 dm = 10 cm 

1 dm³ = 1000 cm³

So, 3.96 dm³ = 3960 cm³

According to the formula,

3960 = \(\frac{22}{7}\)× (\(\frac{0.6}{2}\))² × l 

= l = 14000 cm 

= 1m = 100cm 

= 14000 cm = 140 m