Area of the Patio Around a Swimming Pool

David is designing a rectangular swimming pool that measures 15 feet in length and 10 feet in width. He wants to add a patio that is 3 feet wide completely surrounding the pool. To find out the total area of the patio, we need to determine the area of the larger rectangle formed by the pool and the patio and then subtract the area of the pool from it.

What is the total area of the patio?

The formula for the area of a rectangle is given by:

$$A = l imes w$$