Question

alex needs to buy compressed air to fill 5 empty cylindrical tanks for his store. each tank is 12 feet deep and has a radius of 6 feet what is the volume of compressed air needed?

Answer 1

Volume of a cylinder = the area of the base x height of the cylinder
Area of base = $\pi$r^2
A = 6^2($\pi$)
A = 36$\pi$
V = 36$\pi$ x 12
V = 432$\pi$

5 cylinders = 5V

5V = 5 x (432$\pi$)
5V = 2160$\pi$

Final answer: Alex needs to buy 2160$\pi$ or 6785.84 cubic feet worth of compressed air to fill all of the cylindrical tanks.