Question

Find the area of the following circles, given that:$(Take\pi =\frac{22}{7})$

a)radius$=14mm$

b)diameter$=49m$

c)radius$=5cm$

Answer 1

(a)The radius of the circle is given as $14mm$.

The area of the circle is,

$A=\pi r^2$

$=\frac{22}{7}\times {\left(14\right)}^2$

$=616m{m}^2$

(b) The diameter of the circle is given as $49m$.

The radius of the circle becomes $\frac{49}{2}m$.

The area of the circle is,

$A=\pi r^2$

$=\frac{22}{7}\times {\left(\frac{49}{2}\right)}^2$

$=1886.5m^2$

(c) radius of the circle is given as $5cm$.

The area of the circle is,

$A=\pi r^2$

$=\frac{22}{7}\times {\left(5\right)}^2$

$=78.5c{m}^2$