Volume of a cylinder = the area of the base x height of the cylinder
Area of base = [tex] \pi [/tex]r^2
A = 6^2([tex] \pi [/tex])
A = 36[tex] \pi [/tex]
V = 36[tex] \pi [/tex] x 12
V = 432[tex] \pi [/tex]
5 cylinders = 5V
5V = 5 x (432[tex] \pi [/tex])
5V = 2160[tex] \pi [/tex]
Final answer: Alex needs to buy 2160[tex] \pi [/tex] or 6785.84 cubic feet worth of compressed air to fill all of the cylindrical tanks.
