Barrels, casks, and other containers

http://www.math.nmsu.edu/~breakingaway/Lessons/barrels_casks_and_flasks/Barrels_Casks.html

I would say that this is what Leo was referring to.

Take the average of the diameters of the barrel that you know and then , Volume =Pi*(average R)squared x height
If one does this in inches the result is in cubic inches so convert this to gallons
f you did it in feet the conversion is different.......cubic feet to gallons




So if a barrel had a diameter of 3 feet in the middle and 2 feet on top
that average is 3+2 divided by 2 which is 2.5 so use this diameter to get the rough estimate of volume

Paul Murphy