Question

Find the circumference and area of :-

(i) Radius = 21 cm, using π = 22/7 ​

Answer 1

Answer:

The answer is option b subject to the people

Answer 2

Topic:-

Circumference and area of circle

Given:-

Find the circumference and area of :-

(i) Radius = 21 cm, using π = 22/7

To Find:-

The circumfrence and area of circle

Solution:-

$Circumfrence ={ 2\pi}r$

$= (2 \times \frac{22}{7} \times 21)cm$

$= 132 m$

$Area = {\pi} {r}^{2}$

$= ( \frac{22}{7} \times 21 \times 21) {cm}^{2}$

$1386 {cm}^{2}$

Answer:-

$\bf{Circumfrence = 132cm}$

$\bf \: Area = 1386 {cm}^{2}$