How do you solve this equation without positively knowing the shape of both the walkway and the pool? I am very specific and indecisive so simple/vague things confuse me and this seems like one of those times. I'd know how to solve the problem if I knew the shapes.
I'm assuming that your swimming pool is an oval or something like that remember that the area of an oval is r₁r₂π where r₁ and r₂ are the 2 radii
so
we must do big oval-small oval
the radius is half of the diameter
calculating smalller oval area it is 32 by 18 those are diameter halve them 16 by 9 so the area is 16*9*pi or 144pi square feet
big oval area add 3 feet to each side, so 6 feet total to each dimention the big oval has diameters of 32+6 and 18+6 or 38 and 24 halve them to find the radii 19 and 12 the area is 19*12*pi or 228pi
so the area that is concrete=228pi-144pi=84pi squaer feet or about 263.89 square feet
