Question

Find the circumference of the circle with the following radius $(\text{Take}\pi =\frac{22}{7})$

(a) $14cm$ (b) $28cm$ (c) $21cm$

Answer 1

(a) The radius is given as $14cm$.

The circumference of the circle is,

$C=2\pi r$

$=2\times \frac{22}{7}\times 14$

$=88cm$

(b)

The radius is given as $28cm$

The circumference of the circle is,

$C=2\pi r$

$=2\times \frac{22}{7}\times 28$

$=176cm$

(c)

The radius is given as $21cm$

The circumference of the circle is,

$C=2\pi r$

$=2\times \frac{22}{7}\times 21$

$=132cm$