V = L x W x H
where
L is the length of the prism
W is the width of the prism
H is the height of the prism
Using this formula, we can calculate the volume of the tank in cubic inches:
V = 36 x 18 x 16 = 10,368 cubic inches
To convert cubic inches to gallons, we divide by 231:
V = 10,368 / 231 = 44.9 gallons
Therefore, the tank holds 44.9 gallons of water.