railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Solid Figures
The radii of the internal and external surfaces of a hollow spherical shell are 4 cm and 6 cm respectively. If is melted and recast into a solid cylinder of height 4 / 3 cm, find the diameter of the cylinder.
1
2√38 cm
2
4√38 cm
3
4√19 cm
4
3√38 cm