A rectangular prism has 3 measurements: length (l), width (w) and height (h) The volume of a rectangular prism has the formula: V=lwh The area of the base of the rectangular prism is its length times its width; or Area of base = lw So, the volume of the rectangular prism can be written as: Volume = area of the base * height Substitute in your numbers: 192=48*h h=192/48 h=4 So the height is 4 feet