The base of a right circular cylinder has the same radius 21cm as that of a sphere. Both have the same volume, then the height of the cylinder is

21 25 28 35

28

Volume of cylinder = Volume of  sphere ⇒ \(\pi \) r² h = \(\frac{4}{3}\) \(\pi \) r³ ⇒ \(\pi \) (21)² h = \(\frac{4}{3}\) \(\pi \) (21)³ ⇒ h = \(\frac{4}{3}\) × 21 = 28 cm