railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Mensuration Solid Figures
A 17.5m long hollow cylindrical iron pipe open at both ends is made up of 7m thick iron. The external and internal radii are in a ratio 5 : 4. Then find the volume of the iron in it.
1
20,405 m3
2
12,826 m3
3
24,255 m3
4
23,562 m3