Using the minimum requirements for an "Olympic" size swimming pool of 50m long, 25m wide and 2m deep, volume in mm is 2,500,000,000,000. An ITTF approved Table Tennis ball is 40mm. If they stack perfectly in the pool, they will stack just like if they were cubes. The volume of a cube the same size is 64,000mm. If stacked perfectly 390,625,000 ping pong balls should fit into an olympic swimming pool.
905,141,370
7
Depends on the pool you're comparing it to..
It varies; depending on the size of the marbles
There are usually 50 meters in a Olympic sized swimming pool.
13
8
11-14
Eight
It honestly depends on the swimming pool, but probably a ton. :)
Since 1 gallon equals 90,840 drops and 1 Olympic sized swimming pool has 660,430 gallons, there are 59,993,461,200 drops in an Olympic size swimming pool.
The number of marbles required to fill a bathtub would depend on the size of the bathtub and the size of the marbles. Generally, you would need thousands of marbles to fill a standard-sized bathtub.