90 gallons
400 gallons. http://www.treehugger.com/clean-technology/how-many-gallons-of-water-does-it-take-to-make.html
Aproximately 12,000 gallons
20 gallons
40
It will take 5,104.1 gallons of water to fill this cylinder.
615,142 gallons of water are needed to fill this cylinder.
If you filled it all the way to the top it would take about 2,117 gallons of water.
264 US gallons (to the nearest whole gallon).
Water is not helpful at all as a means of getting to the moon.
That will depend on how deep you want the water to be.
87,537 gallons of water.
It holds about 158.5 gallons.