Matthew has a 20-gallon fish tank full of water
that he needs to move from one room to
another. He pours out all the water.
•The fish tank is a right rectangular prism.
•The fish tank weights 210 pounds when it is filled with water.
•The dimensions of the water inside the fish tank are 34 inches by 12 inches by 12 inches.
•1 cubic foot of water weights 62.4 pounds.
Find the weight of the fish tank when it is empty, to the nearest pound.