Q. If the volume of a cylinder is increased by 21% while the height remains unchanged, the radius is increased by:
✅ Correct Answer: (B)
10%
Explanation: Volume ∝ r². √1.21 = 1.10 ⇒ radius increases by 10%.
Explanation by: Mr. Dubey
Volume ∝ r². √1.21 = 1.10 ⇒ radius increases by 10%.