Question

answer this question fast i have exam please answer correct​

Answer 1

❍ Given,

Radius = 7 cm

So, Area of the given circle = πr²

$\sf \: Value \: of \: π = \frac{22}{7}$

$\sf \: So, \: Area \: of \: the \: given \: circle = \frac{22}{ \cancel 7} \times 7 \times \cancel7 \\ \sf= 22 \times 7 \\ \sf \: = 154cm {}^{2}$

➸Now,

Circumference of circle = 2 πr

$\sf \: = 2 \times \frac{22}{ \cancel7} \times \cancel 7 \\ = \sf 2 \times 22 \\ \sf= 44cm {}^{2}$

❍ Given,

Radius = 8cm

So, Area of the circle = πr²

$\sf \: So, \: Area \: of \: the \: given \: circle = \frac{22}{ 7} \times 8\times 8\\ \sf= \frac{22}{7} \times 8 \times 8\\ \sf \: = \frac{22}{7 } \times 64 \\ \sf \: = \frac{1408}{7} \\ = \sf 201.14 {cm}^{2}$

➸Now,

Circumference of circle = 2 πr

$\sf \: = 2 \times \frac{22}{ 7} \times 8 \\ = \sf \frac{ \:44 \times 8}{7} \\ \sf= \frac{352}{7} \\ = \sf \: 50.2857cm {}^{2}$

❍ Given,

Radius = 9cm

So, Area of the circle = πr²

$\sf \: So, \: Area \: of \: the \: given \: circle = \frac{22}{ 7} \times 9 \times 9 \\ \sf= \frac{22 \times 81 }{7} \\ \sf \: = \frac{1782}{7} \\ = \sf \: 254.57cm {}^{2}$

➸Now,

Circumference of circle = 2 πr

$\sf 2 \times \frac{22}{7} \times 9 \\ \sf= \frac{44 \times 9}{7} \\ = \sf \frac{396}{7} \\ = \sf \: 56.57 {cm}^{2}$

Answer 2

Answer:

yes it is correct mmmmmmmm.