Question

12. The circumference of a circle is 31.4 cm. Find the radius and the area of the circle (Takex3.14)​

Answer 1

$\huge \orange{ \underline {\mathscr{A}} {\underline {\mathbb \green{ns}} {\underline {\mathfrak \red{we}} { \underline\bold \pink{r}}}}}$

Step-by-step explanation:

Circumference = $2\pi \: r$ = 31.4 cm

$\huge = > 2 \times 3.14 \times r = 31.4 \\\huge= > r = 31.4 \div 6.28 \\\huge = > \pink{r = 5cm}$

Area of the circle = $\pi {r}^{2}$

$\huge3.14 \times 5 \times 5 \\\huge = \pink{78.5 \: c {m}^{2}}$