Question 770280
The volume is {{{5*30*22)* (1/12)(1/12)}}} {{{ft^3}}}, because 1 foot is 12 inches.  That is 22.9 cubic feet.  1 gallon is 231 cubic inches.  WATER is 8.345 pounds per gallon, so you can figure the amount of weight for the water.  Including the weight of the empty tank needs that specific information, too.


You might want this way:
{{{5*30*22*12}}} {{{(in/ft)*ft*in*in}}}
{{{39600}}} {{{in^3}}}

and then use 231 cubic inches per gallon, and then 8.345 pounds per gallon, to get the pounds of water which fills the tank.