20
56.52
About 28,944.8L
Circumference = 18 feet.Depth = not known.
You should not put any Earth in your 18 foot round 5 foot deep pool. You should only put water and cleaners in the pool.
fifty-six The circumference of an 18-foot circular swimming pool is: 56.55 feet
10000
About 7,600 gallons
3.35 feet 18 x 18 x 3.35 x 5.9 = 6403 gallons
fifty-six The circumference of an 18-foot diameter circular swimming pool is: 56.55 feet
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.
An 18-foot round pool with 3 feet of water contains 5,734.8 gallons of water. If you fill it to 4 feet deep it increases to 7,646 gallons of water.
If that is 4 feet tall and 18 inches in diameter, it would be 16.83 gallons.