Question

the radius of circle is 91 cm. find it's circumference π=2 upon 7​

Answer 1

Answer:

• circumference of circle is 2πr
• therefore,
• radius= 91cm

$2 \times \frac{22}{7} \times 91$

• 2× 22×13
• 572 cm is your ans

Answer 2

• As per the data given in the question, we have to find the value of the expression.

           Given data:- Radius of circle $=91.$

                         $\pi =\frac{22}{7} .$

           To find:- Circumference of circle=?

           Solution:-

• A circumference of a circle means a linear distance around it.
• The Formula, for the circumference of a circle, is $2\pi r.$

           Therefore,

                    $\begin{array}{l}=2 \pi \mathrm{r}\\=2 \times \frac{22}{7} \times 91 \\=572 \mathrm{~cm.}\end{array}$

     Hence we will get Circumference of a circle is $572cm.$