Question

What is the circumference of a circle with a diameter of 5.8 inches? Use 3.14 for π and round the answer to the nearest tenth. A) 9.1 inches B) 18.2 inches C) 36.4 inches D) 105.6 inches

Answer 1

Option B.

Explanation:

It is given that diameter of the circle is 5.8 inches.

`d=5.8`

Radius of the circle is

`r=(d)/(2)=(5.8)/(2)=2.9`

We need to find the circumference of the circle.

Circumference of a circle is

`C=2\pi r`

Substitute π= 3.14 and r=2.9 in the above formula, to find the circumference of the circle.

`C=2(3.14)(2.9)`

`C=18.212`

Round the answer to the nearest tenth.

`C=18.2`

The circumference of the circle is 18.2 inches. Therefore, the correct option is B.

Answer 2

Answer: B) 18.2 inches

Explanation:

We know that the circumference of a circle is given by :-

`\text{Circumference}=\pi d`

Given : Diameter of a circle = 5.8 inches

Then, the circumference of the circle will be :-

`\text{Circumference}=(3.14)*5.8=18.212\approx18.2\text{inches}`

Hence, the circumference of the circle = 18.2 inches