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
Answer & explanation
Correct answer: option 3
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