Question

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

Answer 1

Find the area of the entire rectangle.
=40 x 18 = 720
Then subtract the area of the pool.
=720 - 320 = 400

The area of the deck is 400 square feet.