Question

A pizza has and area of 314 inches squared. what is the diameter of this pizza the radius

Answer 1

The radius is
`r=10\ in` and the diameter is
`D=20\ in`

Explanation:

we know that

The area of the circle is equal to

`A=\pi r^(2)`

In this problem we have

`A=314\ in^(2)`

substitute and solve for r

assume

`\pi =3.14`

`314=(3.14)r^(2)`

`r^(2)=314/3.14`

`r^(2)=100`

`r=10\ in`

Find the diameter

`D=2r`

`D=2(10)=20\ in`