Question

Find the circumference of a circle whose radius is 20 cm​

Answer 1

Given,

Radius =20 cm

$\mathbf \red{formula \: used}$

circumference of a circle =2 pie r

$\mathbf \red{to \: be \: calculated}$

Circumference =?

$\mathbf \red{solution}$

circumference of a circle =2 pie r

putting the value

Circumference =2×22/7×2

= 88/7

=12.571

Answer 2

Answer:

125.66cm

Step-by-step explanation:

Given that

Radius of circle is 20cm

To find

Circumference of circle

Solution

As we know that

$circumference \: of \: circle = 2 \times \pi \times radius$

put

$\pi = 3.14$

$circumference \: of \: circle = 2 \times 3.14 \times 20$

By multiplication we get

$circumference \: of \: circle = 125.66cm$