ABCD is a rectangle of length 20cm and breadth 10cm. OAPB is a sector of a circle of radius `10sqrt2`cm. calculate the area of the shaded region. [Take `pie`= 3.14] `

Find the area of the circle of radius 4.2cm.

A chord 10cm long is drawn in a circle whose radius is 5sqrt2 cm . Find the area of both the segments.

Find the area of rectangle whose length is 5.7cm and breadth in 3cm.

The circumference of a circle is 31.4cm. Find the radius and the area of the circle. (Take pi=3.14 )

From a circular sheet of radius 4cm, a circle of radius 3cm is removed. Find the area of the remaining sheet. (Take pi=3.14 )

From a circular card sheet of radius 14cm, two circles of radius 3.5cm and a rectangle of length 3cm and breadth 1cm are removed (as shown in the adjoining figure. Find the area of the remaining sheet. (Take pi=22/7 )

In Fig, OACB is a quadrant of a circle with centre O and radius 3.5 cm. If OD = 2 cm, find the area of the shaded region.

A sector is cut from a circle of radius 21/2 cm . IF the angle of the sector is 150^@ , find its area.

In the given figure, Delta POR is an equilateral triangle of side 8 cm and D, E, F are centres of circular arcs, each of radius 4 cm. Find the area r shaded region. (Use pi = 3.14 and sqrt(3) = 1.732)

A wire of lenggth 20 cm is bent in the form of a sector of a circle. The maximum area that can be snclosed by the wire is