If the perimeter of a semi-circular protractor is 36 cm, find its diameter. `("Use " pi = (22)/(7))`

The perimeter of a semicircular protactor is 36cm, its diameter is

The diameter of a semicircular protactor is 14cm. Find its perimeter .

If the perimeter of a protractor is 72 cm, calculate its area. ("use " pi = (22)/(7))

Find the perimeter of a circle of radius 7cm.

In fig., APB and AQP are semi-circles, and AO = OB if the perimeter of the figure is 47 cm, find the area of the shaded region (use pi = (22)/(7) )

The circumference of a circle exceeds the diameter by 16.8 cm. Find the radius of the circle. ("Use " pi = (22)/(7))

Find the area of a sector of a circle with radius 6 cm if angle of the sector is 60^(@). use pi=(22)/(7)

If the circumference of a circular sheet is 154m, find its radius. Also find the area of the sheet. [Take pi=22/7 ]