Question

Find the circumference of circle having radius 21cm

Answer 1

Step-by-step explanation:

The formula for finding the circumference of a circle is

$2\pir$

=2*22/7*21

=132cm^2

Answer 2

Answer:

Hence circumference of circle having radius 21 cm will be 132 cm

Step-by-step explanation:

In context to questions asked

We have to determine the value of circumference of circle

As per questions

We have

Radius of circle = 21 units

As we know that

Circumference of circle is the total length of outer boundary of the circle.

Formula for finding the circumference of circle is

$2\pi \: r$

Where r is radius of circle.

So for determining the value of circumference of circle we will put the value of radius in above formula,

Hence we will get,

$2 \times \frac{22}{7} \times 21 \\ = > 2 \times 22 \times 3 \\ = > 132 \: cm$