Question 1136471

A cannon ball assuming sphere shape,  volume  {{{(4/3)pi*r^3}}}
for radius {{{r}}}.   Using d for diameter, volume   {{{(4/3)pi*(d/2)^3}}}
or {{{(1/6)pi*d^3}}}.


You may want a unit conversion for your diameter inches.
2.54 cm = 1 inch