defence exam Army Cadet College (ACC) Previous Year Papers Mock Quantitative Aptitude Mensuration Solid Figures
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is:
1
3.6 kg
2
3.696 kg
3
36 kg
4
36.9 kg