lots
If you mean a standard barrel it is 55 gallons.
Since it takes about 1/2 an ounce for 30 gallons and 1 ounce for 60 gallons respectively, I would presume about 3/4 of an ounce for 55 Gallons of water...This is from a website I found to determine the same inquiry. There is some room for discussion, the total they give to start off with doesn't equal the end result they say is capable with 1 gallon of BLEACH. So...I would consult with someone at the Red Cross in your local area and they should be able to confirm these figures.
55 US gallons of water is 28,160 tablespoons
about 53 gallons
55 US gallons = about 208.197 liters.
How much water do you take out of a 55 down to be 20%
55 gallons x .2 = 11 gallons.
55 cubic feet is 411.429 gallons.
One gallon of water weighs approximately 8.34 pounds, so 55 gallons would weigh around 459.7 pounds.
55 cubic meters = 14,529.463 gallons (US) 55 cubic feet = 411.43 gallons (US)
Er...55 gallons?
55 gallons?