Q. 7. Find the area of shaded design where ABCD is a square of side 10 cm and semicircles are drawn with each side of the square as diameter
.
Q. 8. Find the area of the shaded region where a circle of radius 6 cm has been drawn with vertex O of an equilateral triangle ABC of side 12 cm as centre.
Q. 9. In the adjoining figure, AB and CD are two diameters of a circle (with centre O) perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.
Q. 10. Find the area of the shaded region in the adjoining figure, where ABCD is a square of side 14 cm.
Q. 11. Find the volume of the shaded region as shown in the figure.
