A wooden toy was made by scooping out a hemisphere of same radius from each end of a solid cylinder. If the height of the cylinder is 10 cm and its base is of radius 3.5 cm, find the volume of wood in the toy.
Radius of the cylinder = Radius of the hemisphere = r = 3.5 cm and
Height of the cylinder, h = 10 cm
Volume of the toy = Volume of the cylinder - Volume of the two hemispheres
= πr2h −2×23πr3
= 205.33 cm3
So, the volume of wood in the toy is 6163) cm3 or 205.33 cm3.