railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Solid Figures
A number of conical tools of radius 5 cm and height 8 cm are melted to form a cylindrical tool of radius and height both equal to 10 cm. Find the number of cones melted to form a new cylinder.
1
20
2
15
3
10
4
5