Question

The face of a clock has a circumference of 62.8 in. What is the area of the face of the clock.

Answer 1

`314in^(2)`

Explanation:

Circumference is
`2\pi r`

Find your radius

`2\pi r=62.8\\\pi r=31.4\\`

Let
`\pi =3.14` for simplicity

r=
`(31.4)/(3.14)`=10

Now use the equation for the area of a circle to find the area of the clock face.

Area of a circle is
`\pi r^(2)`

Area of clock face is
`\pi (10^(2) )`

=
`100\pi`

=
`314in^(2)`

Answer 2

3 943.84π

Explanation:

tienes que usar la fórmula de: pi por radio al cuadrado