A 12 ft by 15 ft rectangular swimming pool has a 4 ft wide no slip surface around it. What is the outer perimeter of the no-slip surface?

Question

a70ft^2
b70ft
c86ft^2
d86ft

Answer 1

The length of the pool with the no-slip surface is 12 + 4 + 4 = <<12+4+4=20>>20 ft.
The width of the pool with the no-slip surface is 15 + 4 + 4 = <<15+4+4=23>>23 ft.
The outer perimeter of the no-slip surface is 2 * (20 + 23) = <<2*(20+23)=86>>86 ft.
The answer is d) 86 ft.