The angle of a sector of radius 14 cm is `90^(@)`. The area of the sector is ________.

The angle of a sector is 120^(@) and its radius is 21 cm. The area of the sector is ______.

The angle of a sector of a circle is 90^(@) . The ratio of the area of the sector and that of the circle is ______.

The perimeter of a sector of a circle of radius 14 cm is 68 cm. Find the area of the sector.

If the angle of a sector is 30^(@) and the radius of the sector is 21 cm, then length of the arc of the sector is ______.

Find the area of a sector of a circle with radius 4 cm, if angle of the sector is 30^(@). (pi=3.14)

Find the area of a sector of a circle with radius 6 cm if angle of the sector is 60°.