A swimming pool and deck are built in a rectangle with length 40 ft and width 18 ft. If the pool itself is 320 square feet, what is the area of the deck itself?
The total area of the rectangle (including both the pool and the deck) is:
40 ft x 18 ft = 720 square feet
We know that the pool has an area of 320 square feet, so we can subtract that from the total area to find the area of the deck:
720 square feet - 320 square feet = 400 square feet
Therefore, the area of the deck itself is 400 square feet.