If you divide the volume of the container by the volume of a penny, you get 52,575 pennies, or $525.75. Obviously this is a high estimate considering there will be significant empty space between coins.
I think the best way to estimate this without using thousands of coins would be to scale it down. Measure how many pennies it takes to fill up one cup and multiply that by 80 (16 cups in a gallon times 5 gallons). It still won't be perfect, but much more accurate than 52,575.
Chat with our AI personalities
The answer will depend on whether you mean UK pennies and the Imperial gallon or US pennies (which are actually cents) and a measure that is a smaller gallon, or a penny from some other country and yet another arbitrary measure which is called a gallon!
32,000, $320.00
To calculate the number of pennies needed to fill a 7-gallon jug, we need to consider the volume of a penny. A penny has a volume of approximately 0.36 cubic centimeters. One gallon is equivalent to approximately 3785 cubic centimeters. Therefore, a 7-gallon jug would have a volume of 26,495 cubic centimeters. Dividing the volume of the jug by the volume of a penny gives us approximately 73,597 pennies needed to fill a 7-gallon jug.
10,000 dollars
you fill the five gallon then dump three of that into the three gallon so you have 3 in the 3 and 2 in the 5 then you dump out the three and fill the 3 with the remaining two gallons and fill the 5 completely so you have a combined 7 gallons.