Momma wrote:Mr. Knight the hole is round. Only a diameter and depth. Diameter is 17 inches and depth is 24. I will certainly look for your reply.

Right then. We're looking for the volume of a cylinder.

The formula for the area of a cylinder is the area of the circle times the depth, or π * rÂ² * h.

If the diameter is 17 inches, then the radius is 8.5 inches. Now that we have everything, we fill in the numbers:

π * rÂ² * h = volume

3.1415 * 8.5 inÂ² * 24 in = volume

3.1415 * 72.25 inÂ² * 24 in = 5447.361 in³

So there are 5447.361 in³ of water. just what is this in gallons?

Well, one gallon is equal to 231 cubic inches, so:

5447.361 in³ / 231 gal/in³ = 23.58 gallons

William J. Knight

Health Physicist

Los Alamos National Labs