Question

What is the best approximation for the circumference of a circle with a radius of 125 m? Use 3.14 to approximate pi.

A. 392.5 m
B. 785 m
C. 1570 m
D. 3140 m

Answer 1

The correct answer is option B. 785 m

Explanation:

Points to remember

Circumference of a circle = 2πr

Where r is the radius of circle

To find the circumference of circle

Here r = 125 m and π = 3.14

Circumference = 2πr

= 2 * 3.14 * 125 = 785 m

The answer is 785 m

Therefore the correct answer is option B. 785 m

Answer 2

For this case we have by definition, that the circumference of a circle is given by:

`C = \pi * d`

Where:

d: It is the diameter of the circle

They tell us that the radius of the circle is 125 meters, then the diameter is 250 meters.

Substituting:

`C=3.14*250\\C=785\m`

Thus, the circumference of the circle is 785 meters

ANswer:

785 meters

Option B