Question

 If the radius of a circle is 21 cm then the area of the circle is ​

Answer 1

Answer:

area of circle =

$\pi \: r \: {}^{2}$

22/7*21*21

1,386cm

Answer 2

Given :

Radius of the circle = 28 m.

To find :

Area of the circle.

$\sf \: So, \: let's \: find \: the \: area \: of \: the \: circle.$

Formula :

$\boxed{ \green{\sf \: Area \: of \: the \: circle \: = \: πr^{2} }}$

Putting value :

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

$\sf \longrightarrow \: \dfrac{9702}{7}$

$\sf \longrightarrow \: \dfrac{9702}{7} \: = 1386$

$\purple{ \sf \: So, \: Area \: of \: the \: circle \: = }\: \green{ \sf1386 \: cm ^{2} }$