what is the perimeter of a 12 * 15 pool with a 3ft non slip surface around it
18 * 21
P = 2L + 2W
78 how did you come up with 21
To calculate the perimeter of the pool with the non-slip surface, we need to add the length of the pool, the width of the pool, and the non-slip surface around it.
First, let's determine the perimeter of the pool itself. The length of the pool is given as 12 feet, and the width is 15 feet. The formula for the perimeter of a rectangle is P = 2L + 2W, where P is the perimeter, L is the length, and W is the width.
Therefore, the perimeter of the pool is P = 2(12) + 2(15) = 24 + 30 = 54 feet.
Next, we need to account for the non-slip surface around the pool. The non-slip surface extends equally on all sides of the pool. Since the width of the non-slip surface is 3 feet, we need to add 2 times the width (2W) to the perimeter.
The perimeter of the pool with the non-slip surface is P = 54 + 2(3) + 2(3) = 54 + 6 + 6 = 66 feet.
Therefore, the perimeter of the 12 * 15 pool with a 3ft non-slip surface around it is 66 feet.