Question

A circle has an area of 40 square meters. Which answer is closest to the measure of its diameter?

Answer 1

7.1

Explanation:

Answer 2

Answer: The correct answer is 7.12 m.

Explanation:

The expression for the area of the circle is as follows;

`A=\pi r^(2)`

Here, A is the area of the circle and r is the radius of the circle.

Calculate the radius of the circle.

`A=\pi r^(2)`

Put A= 40 square meter and
`\pi=3.14`.

`40=(3.14) r^(2)`

`r=3.56 m`

The expression for the diameter is as follows;

d= 2r

Here, d is the diameter of the circle and r is the radius of the circle.

Put r= 3.56 m.

d= 2(3.56)

d= 7.12 m

Therefore, the closest answer to the measure of the diameter of the circle is 7.12 m.