Question 1210578
....., t the formula relies on SQUARING the radius.  Notice,  {{{r^2}}} in there.


To put in the number values directly, full drum volume in cubic inches should be

{{{(3.14159)(22.5/2)^2*33.5}}}

{{{13319.86}}} cubic inches, not rounding too much...


The level being down to {{{2&7/8}}} inch,

{{{13319.86(2.875/33.5)}}}

{{{1143}}} cubic inches.


You can look for the conversion to gallons.




about 4.95 gallons