Find the area of the circle with radius 21 cm

- Find the circumference of the circle with radius 21 cm take π 22 7
- Find the area of a sector of circle of radius 21 cm and central angle 60
- Find the circumference of the circle with the following radius 21 cm
- Find the circumference of the circle having radius 21 cm
- Find the perimeter of a circle with radius 21 cm
- Find the area of a sector of a circle with radius 21 cm and angle of the sector is 60