Question 1063439
I am assuming a cylindrical tower, not conical.
The volume of a cylinder is pi*r^2h, the pi*r^2, coming from the end, which is circular, and the h which is the height.
The 7 goes into the radius, the 20 into the height.
V=3.14*7^2*20
V=3.14*49*20=3077.2 ft^3, the ft^3 being from ft^2 (r^2) * h (ft)