Answer:
11488 ft³
Step-by-step explanation:
diameter of sphere, d = 28 ft
radius of the sphere = half of the diameter = 14 ft
The volume of sphere is given by

where, r is the radius of the sphere
By substituting the values

V = 11488.2 ft³
V = 11488 ft³
Thus, the volume of the sphere is 11488 ft³.