Question

a fish tank holds 32 gallons of water how many pounds of water are in the fish tank

Answer 1

8 pounds a gallon.

32 x 8=?

Answer 2

it's not exactly 8 lbs... It's around 8.25, you have to convert, or show your work some way (if your teacher requires it).

The clearest (not fastest) way is to convert everything into SI unit to get your mass in grams and then convert it back to pounds.

1 gallon is around 3.75 liters. 1 liter = 1 kilogram. 1 kilogram = 2.2 lbs