Exactly 400 million gallons
400 gallons. http://www.treehugger.com/clean-technology/how-many-gallons-of-water-does-it-take-to-make.html
400 billion gallons
The weight of water is approximately 8.34 pounds per gallon. So, 400 gallons of water would weigh around 3,336 pounds.
400 pounds of plain water is about 48 gallons.
If by inches, 409 gallons. Probably 400.
100 gallons is much bigger. There are 16 cups in a gallon, so 400 cups is 25 gallons.
400 million gallons
400 hahaha
33 GALLONS AN AVERAGE HOUSEHOLD USES 13,500 GALLONS OF WATER PER YEAR TO DO 400 LOADS.
You would need 2,451 feet of 2-inch pipe for 400 gallons.
Billions of gallons daily. - Canadians are even worse, -I see my neighbours washing dust and dirt off their driveways with 350-400 gallons of water. One day they may learn.