Answer:
The length of side of patio is 11.27 feet.
Option A is correct option.
Explanation:
Area of patio = 127 ft^2
We need to find side length of the patio.
Since the patio is square, the formula used is:

where l is the side length of square.
Now, putting value of area we can find area of square.

So, the length of side of patio is 11.27 feet.
Option A is correct option.