Answer
A) 86 square feet
Step by step explanation
First let's find the area of the square.
Area of a square = side x side
Here the square of the side = 20 ft.
The area of the square = 20*20
The area of the square = 400 ft^2
Now let's find the area of the circle.
Given: Diameter = 20 ft
Radius = 20/2 = 10 ft
The area of the circle = πr^2
= 3.14 * 10 *10 [π = 3.14]
= 3.14 *100
The area of the circle = 314 square feet
The area of the shaded region = Area of the square - Area of the circle
= 400 - 314
= 86 square feet.
Answer: 86 square feet.
Thank you.