Question

The circumference of a circle is 3.14 m, find its area.

Answer 1

$\huge{\mathbb{\underline{\underline{\blue{S}{\red{O}{\green{L}{\blue{U}{\red{T}{\green{I}{\blue{O}{\red{N:-}}}}}}}}}}}}$

$2\pi \: r = 3.14m$

This is given circumference of the circle

Let's find out the value of r ,

which is the radius of the circle.

$\frac{44}{7} \: r = 3.14 \: m$

$r = \frac{1099}{2200}$

Now , coming to our actual problem

The area of circle is

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

$\frac{22}{7} \times \frac{1099}{2200} \times \frac{1099}{2200}$

$\frac{157}{100} \times \frac{1099}{2200}$

$\frac{172543}{220000}$

$= 0.784286 m^2$

Answer 2

Answer:

$∵ Circumference = 3.14 \\ \\ 3.14 = 2×3.14×r \\ \\ ∴ r= \dfrac{3.14}{2 \times 3.14} = \dfrac{1}{2}m \\ \\ ∴ Area \: of \: the \: circle \\ \\= π×( \dfrac{1}{2})^{2} \\ \\ \sf \red{= 4π m^2}$