



 
We have two responses for you Ray, If the drum is roughly a cylinder, then the water also forms a cylinder with smaller height. 1 US Gallon (liquid) = 231 cubic inches If your measurements are metric it is easy: there are 1000 cubic centimetres in a litre. Victoria
Ray, Victoria's response assumes the drum is standing on its circular end. If the drum is lying on its side then the expression is a little more complicated. Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 