Cannot be answered with only these measurements. You need to specify what shape the pool is. Also, for a rectangular pool, the length, width and depth are needed. For a round pool, the diameter and depth are needed.
A pool that is 15 feet x 30 feet with the average depth of 6 feet is approximately 25,000 gallons.
If it is a rectagular pool, there are approximately 11,496 gallons of water.
It depends how deep the pool is
Assuming all dimensions are in feet there would be 175,044 gallons.
Based on a rectangle. approx 20,250 gallons
A pool that is 15 feet x 30 feet with the average depth of 6 feet is approximately 25,000 gallons.
If it is a rectagular pool, there are approximately 11,496 gallons of water.
It depends how deep the pool is
Assuming all dimensions are in feet there would be 175,044 gallons.
Based on a rectangle. approx 20,250 gallons
To find the gallons in a 30 foot round pool you need to: To take the radius (15) and square it (15 X 15) = 225 X pi 3.14 = 706 X a constant (7.5) = 5298 X the debth 4.5 feet = 23,844 gallons.
pool volume is 15 x30x4 = 1800 cu ft there are 7.48 gallons in one cu ft 7.48*1800 = 13,464 gallons depth of pool is 12 x 4 = 48 inches 13464/48 = 280.5 gallons per inch
26,550 gallons.
1,770 gallons 10x10x3x5.9=
Enough
15 x 30 x 6 = 2700 cu. ft. 7.48 gal/cft x 2700 cft = 20,200 gallons. Or course, it's unlikely that an actual pool would be a straight sided right prism, of dimensions 15x30x6, so it's also unlikely that an ACTUAL pool with those 'nominal' dimensions would contain that many gallons.
There are 4,264 gallons of water per each foot of depth for the pool. You must make your calculation based on the depth of the pool now that you have the above info.