Find the area of a quadrant of a circle whose circumference is 22 cm.
Let the radius of the circle be r
Circumference = 22 cm
2πr = 22
r = 
= 
Quadrant of circle will subtend 90° angle at the centre of the circle
Area of such quadrant of the circle = 
* 
* r2
= 
* π * (
)2
= 
= 
= 
cm2
7