To solve this problem you must apply the proccedure shown below:
1. You must calculate the perimeter of the circle:
The radius of the circle in inches is:


2. Now, you must divide the perimeter by the space between each flower to find the number of flowers needed, which you can call
:

The answer is: 126 flowers.
It will take her about 67 minutes .. ( rounded )
2a + 3p = 1.59
a = 0.24
Plug it in our equation:
2(0.24) + 3p = 1.59
Multiply:
0.48 + 3p = 1.59
Subtract 0.48 to both sides:
3p = 1.11
Divide 3 to both sides:
p = 0.37
So one pair costs <span>£0.37</span>