Answer:
Step-by-step explanation:
The volume of a spherer is defined as
[tex]V=\frac{4}{3} \pi r^{3}[/tex]
Where [tex]r[/tex] is the radius and [tex]\pi \approx 3.14[/tex]
According to the proble, the diameter is 20 feet. By definition of radius,
[tex]r=\frac{d}{2}=\frac{20ft}{2} =10ft[/tex]
Replacing the radius in the volume formula
[tex]V=\frac{4}{3} \pi (10)^{3}[/tex]
[tex]V=4,187 \ ft^{3}[/tex]
Therefore, the volume of the sphere is 4187 cubic feet, approximately.