That is impossible. There has to be a leak.
1 gallon of air would have the buoyancy equal to the weight of 1 gallon of the fluid it is displacing. According to http://www.ehow.com/how-does_5145137_steel-but-steel-boat-float.html Example: 1 gallon of water weighs approx 9 (lbs) therefore 1 gallon of air would have 9 gallons of Buoyancy.
10.34
you fill the 3 gallon bucket into the 5 gallon bucket twice 2 *3 6 gallons but the 5 gallon will only overflow once it hits 5 gallons. You get the 1 gallon half in the 3 gallon bucket and dump the water out of the 5 gallon bucket. You pour the 1 gallon left from the 3 gallon bucket into the 5 gallon bucket and then refill the 3 gallon bucket and put the 3 gallons in making 4 gallons.
if it's full..... 13 gallon... but if it's empty then there would be 0 gallons..
my guess would be 1 gallon of water.
That would depend on the cost of gasoline in your area. At $3.00 per gallon, this would be $96, from a totally empty tank to full.
Which kind? Glass or acrylic?
4 quarts to a gallon. IF a 55 gallon drum is actually holding 55 gallons, it would be 4x55=220 quarts.
Water weighs 8.34 lbs per gallon, so 5 would weigh 41.7 lbs.
1 gallon of water = 10 pounds so the water in the tank is 3000 pounds but all the rocks and decor take up space so there is less then 300 gallons of water but the decor and stuff weighs more then water
if it was empty and the hole is away from the water
== Probably close to the weight of water. 8.34 lbs per gallon.