radius is the line drawn from the direct center of a circle to the outer edge
assuming the pond is a circle
area=pi times radius^2
area=11
11=pi times radius^2
aprox pi to 3.14
11=3.14 times radius^2
divide both sides by 3.14
3.503=radius^2
square root both sides
√3.5=radius which is also √5/2 or C
the answer is C
