The length of the perimeter of a sector of a circle is 20 cm, the maximum area of the sector is

The length of the perimeter of a sector of a circle is 20 cm. Give an expression for the area of the sector in terms of r(the radius of the circle) and hence find the maximum area of the sector.

The perimeter of a sector of a circle of radius 5.2cm is 16.4cm. Find the area of the sector.

The perimeter of a sector of a circle of radius 5.2cm is 16.4cm. Find the area of the sector.

The perimeter of a sector of a circle of radius 5.6 is 27.2 cm. Find the area of the sector.

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

The perimeter of a sector of a circle of radius 5.6 cm is 27.2 cm.Find the area of the sector.

The perimeter of a sector of a circle of radius 5.8 m is 27.2 m. Find the area of the sector.