railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Solid Figures
If the curved surface area of a sphere with radius R1 unit is the same as the total surface area of another hemisphere with radius R2, then the R2 is:
1
\(\frac {2} {\sqrt 3}\) R1
2
2R1
3
same as R1
4
\(\sqrt 3\) R1