Volume = Area of the base x height
To find the area of the base (the circle on the top or bottom), we use the formula
A = π r²
A= π 4² = π 16
Now multiply by 10 (the height) and we get 10 x π x 16 or 160π in³
Some teachers allow you to leave the answer in π units. Other want you to multiply it by 3.14
So the answer is 160π in ³ or 502.4 in ³
