Question

Find the area of a circle radius 21cm (pi= 22/7)​

Answer 1

Answer:

It is given that,

Radius of a circle = 21 cm.

We know that π=22/7,

So the circumference of a circle = 2πr

Substituting the values,

=2∗22/7∗21

So we get,

=2∗22∗3

=132 cm

Answer 2

Answer:

22/7 × 21 =

=22× 3 ( 3× 7= 21)

= 66 sq. cm