Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm, when it is completely immersed in water.

When a solid spherical ball is immersed completely in water, it displaces volume of water equals to its own volume.

Given is, Diameter of spherical ball = 4.2 cm

⇒ radius of spherical ball = 4.2/2 = 2.1 cm

So, volume of a sphere is given by

Volume = 4/3 πr³

Thus, volume of water displaced is 38.81 cm³.