Question

Find the radius and circumference of a circle whose area is 12.32 meter square

Answer 1

Answer:

area of circle =

$\pi {r}^{2}$

value of

$\pi$

=

$\frac{22}{7}$

$12.32 = \frac{22}{7} \times r \times r$

${r }^{2} = \frac{22 \times 7}{12.36}$

12.45

r=12.45

circumference of circle

$= 2 \times \pi \times r$

$2 \times \frac{22}{7} \times 12.45 \times 12.45$

$\frac{44}{7} \times 12.45 \times 12.45$

155.0025

$\frac{44}{7} \times 155.0025$

$\frac{6820.11}{7}$

=974.20