Question

ametallic cube of edge 1 centimetre is drawn into a wire of diameter 4 millimetre then find the length of the wire​

Answer 1

side of cube (a)= 1 cm

volume of cube = a³ = 1 cm³ = 1000 mm³

volume of material remains same

So,

volume of cube = volume of wire

volume of wire = \piπ * r² * h

1000 mm³ = \piπ * (4/2)² * h

h = 1000/[\piπ * 4]

h = 250/\piπ mm = 25/\piπ cm