For example: A rectangular prism has a height of 4 cm, a width of 5 cm, and a volume of 60 cm^3. What is the length of the rectangular prism?

**Solution:**

Volume of a rectangular prism:

V = length * width * height

60 = l*5*4

60 = 20l

60/20 = 20l/20

3 = l

Therefore, the length of the rectangular prism is 3 cm.