railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Mensuration Solid Figures
A solid metallic sphere of radius 42 cm is melted and then recast into a hemisphere. If 50% of the molten metal is wasted in the process, then find the radius of the hemisphere. (in cm)
1
42 cm
2
21 cm
3
84 cm
4
None of the above