Question

fIND the area of each circle (take π =22 upon 7​

Answer 1

Answer:

r= 14 cm

area = pie r^2 (^ sign is power sign)

= 22/7* (14)^2

22/7*196

=22* 28

= 616cm square

b)

d= 42 cm

r= d/2=42/2= 21

area= pie*r^2

=22/7*  (21)^2

22/7 *441

22*63

=  1386 cm square

Answer 2

Answer:

a. 1232 $cm^{2}$ b. 462 $m^{2}$

Step-by-step explanation:

In a.

Given,

r = 14 cm

π = 22/7 [recommended]

Area $a^{2}$ = π $r^{2}$

            = 22/7×14×14

            = 22×2×14

            = 1232 $cm^{2}$

In b.

Given,

r = ?

d = 42 m

π = 22/7 [recommended]

Area $a^{2}$ = π $r^{2}$

∵ r = $\frac{1}{2}$d

∴ r = 1/2 × 42

    = 21 m

Finally,

$a^{2}$ = 22/7 × 21 × 21

   = 22 × 3 × 21

   = 462 $m^{2}$