Posted by **Anonymous** on Tuesday, March 15, 2011 at 10:45am.

A circular swimming pool is 4 feet deep and has a diameter of 15 feet. If it takes 7.5 gallons of water to fill one cubic foot, to the nearest whole number, how many gallons are needed to fill this swimming pool.

Diameter = 2r

A = π r^2

V = 4A

W = 7.5V

- Math -
**PsyDAG**, Wednesday, March 16, 2011 at 2:35am
Plug in the values, starting with the first equation.

D = 2r, therefore D/2 = r

Put the value of r in the second equation to find A.

Put the value of A in the third equation to find V.

W = # of gallons = 7.5V

You can do the calculations.

## Answer This Question

## Related Questions

- Math - A circular swimming pool is 4 feet deep and has a diameter of 15 feet. If...
- Math - A swimming pool that is 100 feet in length by 10 feet deep and 40 feet ...
- calculus - my circular swimming pool has a 29 foot diameter and is 8 feet tall. ...
- Math - A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the deep ...
- Calculus - A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the ...
- math - A circular pool has a diameter of 12 feet. The pool is 5 feet deep ...
- math - The portion of a swimming pool that is below the full water line measures...
- Math - a pool 5 feet deep with a diameter of 40 feet is filled with water in 50 ...
- Algebra 1 - A circular pool has a diameter of 12 feet. The pool is 5 feet deep ...
- Math - The portion of a swimming pool that is below the full water line measures...

More Related Questions