state gov UP Police Head Operator (Radio Cadre) Mock Test Quantitative Aptitude Mensuration Solid Figures
A hollow cylindrical tube 20 cm long is made of iron and its external and internal diameters are 8 cm and 6 cm respectively. The volume (in cubic cm) of iron used in making the tube is (Take n = 22/7)
1
1760
2
440
3
220
4
880