An aquarium is 12 inches high 24 inches long and 10 inches w

An aquarium is 12 inches high, 24 inches long, and 10 inches wide. A goldfish needs 144 cubic inches of space to live. How many goldfish can this aquarium support?

A. 15

B. 20

C. 22

D. 24

Solution

B. To solve this problem, use the formula V = Iwh. You have been given the dimensions of I = 24 inches, w = 10 inches, and h = 12 inches. Substitute that information into the formula.

V = (24)(10)(12) = 2,880 in³

If a goldfish needs 144 in³ to exist in the aquarium, divide that number into the total amount of volume.

2880 in³ ÷ 144 in³ = 20 goldfish.