A measuring jar of internal diameter 10cm is partially filled with water. Four equal spherical balls of diameter 2cm each are dropped in it and they sink down in water completely. What will be the change in the level of water in the jar?

Explanation

`pi r^2 h = 4 xx (4/3)pi r^3`
`⇒ pi xx 5^2 xx h = 4 (4/3 xx pi xx 1^3)`
`⇒ 25 h = 16/3 `
`⇒ h = 16/3 xx 1/25`
`⇒ h = 16/75 cm`