Question

What is the area of a circle whose circumference is 22 cm ?
22
元=
7​

Answer 1

Explanation:

Let r be the radius of the circle.

Then, Circumference=22cm

⇒2πr=22

⇒2×

7

22

×r=22

⇒r=

2

7

cm

∴ Area of the circle=πr²

=

7

22

×

2

7

×

2

7

cm ²

=38.5cm²

Answer 2

2 pie r = 22

r = 22× 7/ 2×22

r= 3.5cm

pi r sq. = 22/7 × 3.5×3.5

= 38.5cmsq.