Find the area of a flat circular ring formed by two concentric circles (circles with same centre) whose radii are 9 cm and 5 cm

Find the area of a flat circular ring formed by two concencencencentric circles (circles with same centre) whose radii are 9cm and 5cm

Find the area of the shaded region in the given figure, if radii of the two concentric circles with centre O are 7 cm and 14 cm respectively and angle AOC = 40^(@) .

The area of a circular ring enclosed between two concentric circles is 286 cm? Find the radii of the two circles, given that their difference is 7 cm.

Find the area of the space enclosed by two concentric circles of radii 25 cm and 17 cm.

Find the area of the shaded region in Fig.12.20, if radii of the two concentric circles with centre O are 7cm and 14cm respectively and /_AOC=40^(@)

Find the area of the ring shaped region enclosed between two concentric circles of radii 4cm and 3cm.

Find the area of a ring shaped region enclosed between two concentric circles of radii 20 cm and 15 cm.

Find the area of a ring shaped region enclosed between two concentric circles of radii 20 cm and 15 cm.

The area of the ring between two concentric circles, whose circumference are 88 cm and 132 cm, is:

Find the areas of the circles whose radii are (a) 14m (b) 28cm