Volume of a cube = side³

Volume of a sphere = (4/3)πr³

Given, spherical bullets are to be made out of a solid cube of lead whose edge measures 44 cm, each bullet being 4 cm in diameter.

Let the number of bullets be ‘a’.

⇒ 44³ = a × (4/3) × (22/7) × 2³

⇒ a = 2541