A 12-ft-15-ft rectangular swimming pool has a 3-ft-wide no-slip surface around it. What is the outer perimeter of the no-slip surface?
2(12+6 + 15+6) = ____ ft
To find the outer perimeter of the no-slip surface, we need to determine the dimensions of the pool and then calculate the dimensions of the no-slip surface.
The rectangular swimming pool has a length of 12 ft and a width of 15 ft.
To calculate the dimensions of the no-slip surface, we need to add the width of the no-slip surface on all sides of the pool. Since the pool has a 3-ft-wide no-slip surface around it, we need to add 3 ft to the length and width of the pool.
The length of the outer perimeter of the no-slip surface is calculated as follows:
Length of pool + 2 * width of no-slip surface
= 12 ft + 2 * 3 ft
= 12 ft + 6 ft
= 18 ft
The width of the outer perimeter of the no-slip surface is calculated as follows:
Width of pool + 2 * width of no-slip surface
= 15 ft + 2 * 3 ft
= 15 ft + 6 ft
= 21 ft
Therefore, the outer perimeter of the no-slip surface is 18 ft + 21 ft = 39 ft.
To find the outer perimeter of the no-slip surface, we first need to calculate the dimensions of the pool with the no-slip surface included.
The length of the pool with the no-slip surface can be calculated by adding the width of the pool and the width of the no-slip surface on both sides:
Length of pool + 2 * Width of no-slip surface = 15 ft + 2 * 3 ft = 15 ft + 6 ft = 21 ft
Similarly, the width of the pool with the no-slip surface can be calculated by adding the length of the pool and the width of the no-slip surface on both ends:
Width of pool + 2 * Width of no-slip surface = 12 ft + 2 * 3 ft = 12 ft + 6 ft = 18 ft
Now that we know the dimensions of the pool with the no-slip surface, we can calculate the outer perimeter of the no-slip surface by adding the length and the width of the pool with the no-slip surface:
Outer perimeter = 2 * (Length + Width) = 2 * (21 ft + 18 ft) = 2 * 39 ft = 78 ft
Therefore, the outer perimeter of the no-slip surface is 78 ft.