The volume of the tank can be calculated using the Volume of a cylinder formula, which is:

Where:
v = volume;
r = radius;
h = height.
In this exercise:
r = Diameter/2 = 12/2 = 6 ft
h = 16 ft
So, substituting the values:

Using π = 3.14:

Answer:
The volume of the tank is 1809 ft³.