state gov Karnataka Police SI (KSP SI) Mock Test 2025 Quantitative Aptitude Mensuration Solid Figures
If the radius of a sphere is increased by 3.5 cm, its surface area increases by 550 cm2. What was the original radius of the sphere? (use π = \(\frac{22}{7}\))
1
4 cm
2
6 cm
3
4.5 cm
4
3.5 cm