Question

An aluminum sphere of diameter 12 cm is drawn into a wire of diameter 4 cm. What will be the length of the wire?
A) 72 cm
B) 48 cm
C) 96 cm
D) 84 cm

Answer 1

Hey mate,

radius of sphere=6cm

wire is in the shape of a cylinder. so,radius of cylinder=2cm

length of wire=height of cylinder

volume of sphere=volume of cylinder

4/3πr cube=πr sq h

4/3x6x6x6=2x2xh

864/3=4h

4h=288

h=72cm

option A is correct