An aquarium holds 33.75 gallons of water. it has a length of 2 feet and a height of 1.5 feet. What is the volume of the aquarium?

Assuming that the aquarium is rectangular, the formula to work out the volume would be

V = L x H x D

Considering that 1 gallon = 231 inches³

Multiply both by 33.75 to get the total number of inches³ (volume)

231 x 33.75 = 7796.25 inches³

If you also want the depth, read on ...

Also, there are 12 inches in one foot

Length = 2 x 12 = 24 inches

Height = 1.5 x 12 = 18 inches

Now we can fill in the information we know

7796.25 = 24 x 18 x D

To work out D, we divide the volume by the values we know

7796.25 / 18 = 433.125

433.125 / 24 = 18.046875 inches

18.046875 / 12 = 1.50390625 feet

To the nearest 2d. p. ≈ 1.5 feet