Question

A donut machine makes small glaze donuts the diameter of each doughnut is 8 cm. What is the circumference of each doughnut created ?Round to the nearest hundredth.

Answer 1

50.29 cm

Explanation:

Given:

Diameter of each doughnut = 8 cm

To find: circumference of each doughnut

Solution:

Circumference refers to the boundary of a geometric figure.

A doughnut has the shape of a circle.

Let r represents the radius of the circle.

Diameter of each doughnut = 8 cm

Radius of each doughnut (r) = Diameter/2

`=(8)/(2)\\ =4 \,\,cm`

Circumference of each doughnut
`=\pi r^2\\`

Put
`r=4\,\,,\pi=(22)/(7)`

So, circumference =
`=(22)/(7) (4)^2`

`=(352)/(7) \,\,cm\\=50.29\,\,cm`