Question

Kiyo used to wire fencing to form a border around a circular region in his backyard. If the radius of the circular region was 5 yards, what was the total length of the border, rounded to the nearest tenth of a yard ?

Answer 1

The total length of the border is
`31.4\ yd`

Explanation:

we know that

The circumference of a circle is equal to

`C=2\pi r`

we have

`r=5\ yd`

assume

`\pi=3.14`

substitute

`C=2(3.14)(5)=31.4\ yd`