The formula to find the volume of a cylinder is V=[tex] \pi r^{2} [/tex]h so you would first have to find the radius which would be 11 because half of 22 is 11 and the radius is half of the diameter. You would replace r with 11 and replace h with 18 so you should have V=[tex] \pi 11^{2} [/tex]18 and then you just solve it. You should get V≈6842.39
