To calculate the volume of a cylinder with radius of the base r and height h we can use the following formula.
V=π r^2 h
From the diagram, we know that the height of the cylinder is 5 ft, and that the diameter of the base is 2.5 ft. By dividing the diameter by 2, we get the radius of the base.
r = 2.5/2 = 1.25 ft
Let's substitute these values to find calculate V.