First, we need to find out the volume of the previous solid metal cylinder.

h= 10 cm

r = 4.2 cm

Volume of cylinder before scooping out = πr²h

= 176.4π cm³

Volume of scooped part =

4/3πr³

= 4/3 × π × (4.2)³

= 98.784π ≈ 98.8π cm³

Therefore volume of the scooped metal cylinder = 176.4π- 98.8π = 77.6π cm³

Now For wire,

Diameter = 1.4 cm

Radius = 1.4/2 = 0.7

The volume of the scooped metal cylinder = The volume of the wire

77.6π = πr²h

Cut π from both the sides

77.6 = (0.7)²h

h = 77.6/0.49

h = 158.36 cm ≈158.4 cm

Therefore, the length of the wire would be approximately 158.4 cm.