Q. The radius and height of a cone are each increased by 20%. The percentage increase in its volume is:
✅ Correct Answer: (C)
72.8%
Explanation: New volume = (1.2)² × 1.2 = 1.728 times the original. Increase = 72.8%.
Explanation by: Krishna Sharma
New volume = (1.2)² × 1.2 = 1.728 times the original. Increase = 72.8%.