Question

find the area of a circle whose radius is 21 CM

Answer 1

hii!!

here's ur answer...

given the radius of the circle is 21cm.

we know the formula of finding area of circle, that is πr²

so area of the circle=πr²

=22/7×21×21

=22×3×21

=66×21

=1386cm²

hope this helps u..!

Answer 2

Answer:

=> 1386 $cm^2$

Step-by-step explanation:

As per the data given in the question, we have to find the area of a circle.

Given that:-

Radius = $21$ cm

To find - Area of a circle,

As we all know, the formula of

Area of circle = $\pi r^2$sq. units

As the value of $\pi$ is $\frac{22}{7}$,

Therefore,

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

Dividing 21 by 7 we get,

$=> 22\times 3\times 21$

$=>1386cm^2$

Hence, the area of a circle is $1386$ $cm^2$.