Question 974615
Full or empty or between full and empty?


If full, then the area controls the mass for the canister, and the volume controls the mass for the water.




The big canister weights 135 kilograms.  You still have a proportion.  
{{{(6*30*30)/(6*90*90)}}} is what you really have as a conversion.


Same as {{{9/81=1/9}}}.


{{{n/135=1/9}}}


{{{n=135/9}}}


n=15 kg.