Question

The diameter of a circle is 28 cm. Find its:
(i) Circumference
(ii) Area.
$\left[2Marks\right]$

Answer 1

Let’s assume r to be the radius of the circle

(i) Given, diameter = 28 cm

So, radius = 28/2 = 14 cm

Now,

Circumference = 2πr

= 2 x 22/7 x 14

= 88 cm

$\left[1Mark\right]$
(ii) The area of the circle is given by

Area = πr2

= 22/7 x 142

= 22/7 x 14 x 14

= 44 x 14

= 616 sq.cm
$\left[1Mark\right]$