Height of the cylinder=3×6=18cm. Radius of the cylinder=6/2=3cm.
Volume of cylinder=π3²(18)=162π=508.68cc approx.
a) three ball diameters=18cm.
b) volume of cylinder of height h=18cm and radius r=half of ball diameter=6/2=3cm is πr²h=π(9)(18)=162π=508.68 cubic cms.