CTS Company Numerical Ability Area and Volume

what is the length of a cylindrical wire of radius 3mm that can be drawn from a copper sphere of radius 21cm?

Read Solution (Total 1)

1372 m.

Volume of Sphere=(4/3)*Pi*21^3
Volume of cylindrical wire with length 'x' =Pi*0.3^2*x
As both the volumes will be same, (4/3)*Pi*21^3 = Pi*0.3^2*x
x=(4/3)*21^3/0.3^2=12348/0.09=137200 cm= 1372 m.
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