Step-by-step explanation:
The formula for area of a circle is
πr2
Where
r denotes the radius of the circle.
Equating the formula for area with the area of the circle provided.
πr2=81π
r2=81
r=√81
r=9 inches
the formula for volume is
V=4/3πr³
4/3pi9³
V≈3053.62806 m³
