Question

What is the approximate area of a circle with a diameter of 15 in?

Answer 1

The area of a circle is calculated as ,

`a=\pi r^2`

Here, r is the radius, which is same as that of hlf the diameter.

So,

`r=(d)/(2)=(15)/(2)=7.5\text{ in}`

Therefore the area is,

`\begin{gathered} a=\pi*7.5^2 \\ \text{ =3.14}*56.25 \\ \text{ =}176.652in^2 \end{gathered}`