Question

Carolyn has a circular swimming pool with a diameter of 20 feet. She needs to know the area of the bottom of the pool so that she can find out how much paint to buy for it. What is the approximate area?

Answer 1

To find the area of the bottom we have to use the formula to find the area of a circle:

`A=\pi r^2`

Where A is the area and r is the radius.

The first step is to find the radius of the circle, which is half the diameter:

`\begin{gathered} r=(D)/(2) \\ r=(20ft)/(2) \\ r=10ft \end{gathered}`

Replace r in the given formula and use 3.14 as pi:

`\begin{gathered} A=3.14\cdot(10ft)^2 \\ A=314ft^2 \end{gathered}`

The answer is 314ft^2.