2014 · Q90
A drainage tile is a cylindrical shell 21 cm long. The inside and outside diameters are 4.5 cm and 5.1 cm respectively. What is the volume of the clay required for the tile?
Elementary MathematicsMensuration
- A6.96π cubic cm
- B6.76π cubic cm
- C5.76π cubic cm
- DNone of the above
Explanation
Volume = π(2.55^2 - 2.25^2)(21) = 29.16π, not among (a)-(c).