Question

find the area of a circle whose circumference is 22cm​

Answer 1

We know that circumference is 2πr

Hence 2πr=22

2×22/7 ×r=22

r=7/2

We know that area of circle=πr^2

22/7×7/2×7/2

77/2

Hence area of circle is 77/2 cm^2

Answer 2

Answer:

2rR = circumference

2×22/7×R = 22

44/7R = 22

R = 22× 7/44

R = 3.5

AREA OF CIRCIE = rR^2

= 22/7×3.5×3.5

=38.5cm^2