Answer:
Step-by-step explanation:
To start the problem, you recognize that the figure is a cone with a radius of 21 ft and a height if 12 ft.
Then, you consult your list of volume formulas to find the one for the volume of a cone. It is ...
V = (1/3)πr²h . . . . . where r is the radius and h is the height
Fill in the given numbers and do the arithmetic.
V = (1/3)π(21 ft)²(12 ft) = 1764π ft³ ≈ 5542 ft³
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If your calculator does not have a button for π, you can use 3.14159. Most spreadsheets will have a PI() function that will give this value.
