That's 18 qt less 7 qt ie 11 qt = 2 gal 3 qt
1 qt = 1 gal 2 qt = 2 gal
30 quarts
2½ gall
(10 gal 1 qt) x 2 = 20 gal 2 qt = 20.5 gal
no. 2 gal = 8 qt. 1 gal is equivalent to 4 qt.
There a 4 qt in a gallon SO...4 qt/gal X 2 gal = 8 qt
17 gal 2 qt
4 qt = 1 gal8 qt = 2 gal12 qt = 3 gal
5 gal 6 qt
4 gal & 3 qt
2 1/2 gal or 2.5 gal