50
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.
Depends on how big it is
The amount of sand in a pool filtration system depends on its size.
Since the pool is 1477440 cubic inches, it'll hold about 6395.844 gallons of water.
around 4500 gallons
It depends on how long the pool is.
There is not enough information. What is the height of the pool? The pool area is 648 square feet.
to calculate the content of the pool go to this link
3,861 Gallons
Not necessarily. 250 mL is the volume of one standard or metric cup. A drinking glass does not necessarily have to hold this much. Drinking glasses may hold more or less. But a metric measuring cup should hold exactly 250 mL.
Litres.