Question

sphere of diameter 30cm is drawn into wire of diameter of 4mm what is length of wire

Answer 1

volume of sphere =4/3 pi r^2
=4/3×22/7×150 (mm)×150
=approximately 94285 mm^3 or 94.285 cm^3.
base of wire = pi r^2=12.5 (approx)
therfore height of wire=94585÷12.5
=7566.8 mm

Answer 2

volume of the sphere = volume of the cylinder(wire)
r1=radius of the sphere=30cm
r2=radius of the wire=4mm=0.4cm
2/3π$r1^{3}$=π$r2^{2}$h
2/3*30*30*30=0.4*0.4*h
h=2*30*30*30/1.2*0.4=30*30*30/0.24=27000/0.24
=27000*100/24=112500cm=112.5m