Question

What is the approximate area, in square feet of the remaining board?

Answer 1

The side of the square is 12 feet.

Hence the area of the square is

$A=12\times12=144$

Now the area of the circle is

$B=3.14\times6\times6$

Since the radius is 12/2=6.

B= 113.04

Hence the required area is A-B = 144-113.04 =30.96

That is 31 feet^2.