Question

the radius of a circle is 10. 5 CM find the circumference of the circle​

Answer 1

Answer:

66

Step-by-step explanation:

C=2πr

=2.22/7.10.5

=66

hope it helps

Answer 2

Before, finding the answer. Let's find out how we can find the answer.

• Here in this question, we are asked to find the Circumference of the Circle.
• So, to find the Circumference we must use the formula of :

$\boxed{\sf Circumference \: of \: circle = 2 \pi r}$

Where we have to multiply twice the radius with pi.

• Here, we will take pi as :

$\sf \pi = \dfrac{22}{7}$

________________________

Given :

• Radius = 10.5 cm

To find :

• Circumference of the circle

Solution :

We know that,

$\sf Circumference \: of \: the \: circle = 2 \pi r$

                                       $\sf = 2 \times \dfrac{22}{7} \times radius$

                                       $\sf = 2 \times \dfrac{22}{7} \times 10.5$

                                       $\sf = \dfrac{22}{7} \times (10.5 \times 2)$

                                       $\sf = \dfrac{22}{7} \times 21$

                                       $\sf = \dfrac{462}{7}$

                                       $\sf = 66 \: cm$

Therefore, the Circumference of the circle is 66 cm.