The volume of a cone shaped hole is 16 pi ft^3. If the hole is 3 ft deep, what is the radius of the hole?

Answer 1

volume = (pi)(r^2)(h) all divided by 3
so you are given certain information and have to re-arrange and solve for the radius (r)
16=(3.114159)(r^2)(3) mulitply pi by the 3
16=9.42477(r^2) divide both sides by 9.42477
1.6976 = (r^2) then take the square root of both sides to get the radius : )

Answer 2

V = 1/3 pi r^2h, so
1/3 pi r^2*3 = 16pi
r=4

Answer 3

Ooooppss lost my divide by 3 in the beginning of the question.
Thanks so much Steve for the fast fix : )

Answer 4

No problem. It wasn't meant as a fix (note the timestamp), just my 2-cents worth.