The building has 42 storage units that are a total of 5040 square feet. Twenty of the units are 8 by 4 feet each. If the remaining units are all the same size, what is the area, in square feet, for one of the remaining units? Give me reasons, before answering the question
8 * 4 = 32 square feet. 20 * 32 = 640 square feet. 5040 - 640 = 4400 square feet. There are 42 - 20 = 22 remaining units. 4400 / 22 = 200 square feet. One of the remaining units is 200 square feet. So the final answer is 200.