Answer:
86 ft
Explanation:
To find the outer perimeter of the no slip surface around the rectangular swimming pool, we need to calculate the combined lengths of the four sides.
First let's calculate the dimensions of the no slip surface:
The pool is 12ft x 15ft and there is a 4 ft wide no slip surface around it. This means that the dimensions of the no slip surface will be 12+4+4=20ft by 15+4+4= 23ft.
Now let's calculate the perimeter:
the perimeter is the sum of the lengths of all 4 sides. Since the shape is a rectangle opposite sides have equal lengths.
The lenghths of the shorter sides is 20ft
The lengths of the longer sides is 23ft
The find the outer perimeter we add all 4 sides:
20+20+23+23 = 86ft