V=4/3*Pi*r^3
4/3*Pi*r^3=36
r^3=36*3/(4*Pi)
r^3=27/Pi
r=3/(sqrt(3){Pi})
d=2r=2*3/(sqrt(3){Pi})=6/(sqrt(3){Pi})
V=4/3*Pi*r^3
4/3*Pi*r^3=36
r^3=36*3/(4*Pi)
r^3=27/Pi
r=3/(sqrt(3){Pi})
d=2r=2*3/(sqrt(3){Pi})=6/(sqrt(3){Pi})