Third one down
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The volume of a cone uses the following formula:

Our diameter is 20 feet, so divide this by 2 to find the radius:

We now have all of our values need to fill in the formula. Plug in these values:




The volume of the cone is
1780 cubic feet.
Answer:
396.8
Step-by-step explanation:
Multiply them to each other.
The answer is
A) 3 1/4 feet