Answer:
The formula for the volume of a cylinder is:
V = πr^2h
where V is the volume, r is the radius, and h is the height.
Substituting the given values, we get:
V = π(7ft)^2(31ft)
V = π(49ft^2)(31ft)
V = 49π(31ft^3)
V ≈ 15,067.05 cubic feet (rounded to two decimal places)
Therefore, the volume of the silo is approximately 15,067.05 cubic feet.