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

Answer: B) 18.2 inches

Step-by-step 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 :-

$\text{Circumference}=(3.14)\times5.8=18.212\approx18.2\text{inches}$

Hence, the circumference of the circle = 18.2 inches

Answer 2

Answer:

Option B.

Step-by-step explanation:

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

$d=5.8$

Radius of the circle is

$r=\dfrac{d}{2}=\dfrac{5.8}{2}=2.9$

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.