In the given figure, $OBCA$ is a quadrant of a circle with centre $O$ and radius $3.5 \mathrm{cm}$. If $OD=2 \mathrm{cm}$, find the area of the shaded region in square centimetres. (Use $\mathrm{\pi }=\frac{22}{7}$)

 

Find the perimeter of the shaded region in the figure, if $ABCD$ is a square of side $14 \mathrm{cm}$ and $APB$ and $CPD$ are semicircles.

If the perimeter is $k \mathrm{cm}$, find $k$.(Use $\mathrm{\pi }=\frac{22}{7}$)

 In a circle of radius $7 \mathrm{cm}$, a square $ABCD$ is inscribed. Find the area of the circle which is outside the square.

If the area is $k {\mathrm{cm}}^2$, find $k$. (Use $\mathrm{\pi }=\frac{22}{7}$)

In the given figure, $APB$ and $CQD$ are semicircles of diameter $7 \mathrm{cm}$ each, while $ARC$ an $BSD$ are semicircles of diameter $14 \mathrm{cm}$ each. If the perimeter of the shaded region is $k \mathrm{cm}$, then find the value of $k$ considering $\mathrm{\pi }=\frac{22}{7}$.

In the given figure, $APB$ and $CQD$ are semicircles of diameter $7 \mathrm{cm}$ each, while $ARC$ an $BSD$ are semicircles of diameter $14 \mathrm{cm}$ each. If the area of the shaded region is $k {\mathrm{cm}}^2$, then find the value of $k$ considering $\mathrm{\pi }=\frac{22}{7}$.( write the answer in decimals)

 In the given figure, $PSR, RTQ$ and $PAQ$ are three semicircles of diameter $10 \mathrm{cm}, 3 \mathrm{cm}$ and $7 \mathrm{cm}$ respectively. If the perimeter of the shaded region is $k \mathrm{cm}$, then find $k$. $[$Use $\mathrm{\pi }=3.14]$

In the given figure, a square $OABC$ is inscribed in a quadrant $OPBQ$ of a circle. If $OA=20 \mathrm{cm}$, find the area of the shaded region. [Use $\pi =3.14$.]

If the area of the shaded region is $k {\mathrm{cm}}^2$, find $k$

In the given figure, $APB$ and $AQO$ are semicircles and $AO=OB$. If the perimeter of the figure is $40 \mathrm{cm}$, find the area of the shaded region.

If the area of the shaded region is $k {\mathrm{cm}}^2$, then find $k$

Find the area of a quadrant of a circle whose circumference is $44 \mathrm{cm}$.

If the area of the quadrant is $k {\mathrm{cm}}^2$, find $k$