9 Acres = 36,421.7 square meters.
4 feet = 1.2 meters.
Area x length = volume; 36,421.7 x 1.2 = 43,706 cubic meters.
Cubic meters is a volume, which can be converted to liters, 1 cubic meter is 1000 liters. So your pond has 43,706,000 Liters. 1 gallon is 3.78 liters, so divide by 3.78 and your pond has 11,545,903.7 Gallons.
It depends on how long the pool is.
About 2,794 gallons of water.
50
43560x7x7.48052=2,280,960.1584
We can't be sure - we need another dimension. If the Pool is 20 feet long by 48 feet wide, we need to know how deep it is - a 2 foot deep pool will not hold as much as a 10 foot deep pool. If the pool is not a uniform depth, there are formulae used to determin how much water the pool will hold. Try calling Anthony. Or Esther Williams.
A 25-acre pond that is uniformly 6 feet deep will hold about 48,877,714 gallons of water.
42" is 3½'.
how many gallons of water does a swimming pool 15 feet by 4 feet deep hold
It depends on how long the pool is.
Any size pond that can hold at least 977,600 gallons of water.
About 4,490 gallons of water.
About 2,794 gallons of water.
50
A pool with these dimensions can hold up to 11,407.5 gallons of water.
43560x7x7.48052=2,280,960.1584
Approximately 977,553 gallons of water.
Approximately 8,146,286 gallons of water.