Chapter 11, Problem 39SGR

To determine

To find the Area.

Answer to Problem 39SGR

63.58 in²

Explanation of Solution

Given Information: Diameter = 9 in.

Formula Used:Area of circle = $\pi \times r^2$ , $\pi =\frac{22}{7}$ , $radius=\frac{diameter}{2}$ .

Calculation:

Diameter = d, Radius = r.

Now, diameter is of 9 in.

So, $radius=\frac{diameter}{2}$

Put the value of diameter to find the radius.

  $radius=\frac{9}{2}$ in.

Hence,

  $radius=4.5$ in.

Area of top crust = $\pi \times r^2$

Area of top crust = $\pi \times {(4.5)}^2$ in²

Now, $\pi =\frac{22}{7}$

Put the value of $\pi$ to find the area

Area of top crust = $\frac{22}{7}\times 4.5\times 4.5$ in²

Area of top crust = 63.58 in²