A walking area around a pool is going to be frfinished with a nonslip surface. If it costs $17 per square foot to install what is the total cost?

Inner rectangle is length 20 ft by width 10 ft. Outer dimensions of walkway are 14 length by 10ft.

I have no idea how to set up this question.

find the area of the inner rectangle, and the

area of the larger rectangle.
take the difference, that will give you the area of the walkway in square feet.
Multiply that by the cost of each square foot.