railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Solid Figures
If the radius of a sphere is increased by 4.5 percent, then what per cent increase takes place in surface area of the sphere?
1
13.5 percent
2
20.25 percent
3
9.2025 percent
4
9 percent