Question

12 foot by 15 foot swimming pool has a 3 ft wide no slip surface around it what is the outer perimeter of the no slip surface

Answer 1

the pool is 12 x 15

 add 6ft to each dimension ( 3 feet on each side)

12+6 = 18

15+6 = 21

21 *2 = 42

18*2 = 36

42 +36 = 78 feet perimeter