The volume of the aquarium is 120,000 cm3. Find the height of the aquarium if it is 60cm long and 40cm wide.

According to the condition of this problem, it is necessary to find the third dimension of a rectangular parallelepiped with a known volume and known two other measurements, in our case it is necessary to determine the height of the aquarium with known volume, length and width. The formula for finding the height of a rectangular parallelepiped will be like this:

120000 / (60 * 40) = 120000/2400 = 1200/24 = 50 (cm);

Verification:

60 * 40 * 50 = 60 * 2000 = 120,000 (cm3);

Answer: the height of the aquarium is 50 cm.