Question

if the radius is 21cm find its area

Answer 1

Radius is given as 21cm

$area = \pi {21}^{2}$

$\: \: \: \: = \pi441 \\ consider \: \pi \: as \: \frac{22}{7}$

$\: \: \: \: = \frac{22}{7} \times 441$

$\: \: \: \: = 22 \times 63$

$\: \: \: \: = 1386$

$hence \: area \: of \: circle \: is \: 1386 {cm}^{2}$

HOPE THIS MAY HELP YOU

Answer 2

Answer:

1386 cm^2

Step-by-step explanation:

GIVEN:

r =21 cm

Area of circle=πr^2

= 22/7 x 21^2

=22/7 x 441

= 22 x 63

= 1386 cm^2