A chord of a circle of radius $10 \mathrm{cm}$ subtends right angles at the centre. The area of the minor segment (given, $\pi =3.14$) is

In a circle of radius $21 \mathrm{cm}$, an arc subtends an angles of $60°$ at the centre. The length of the arc is

[Take $\mathrm{\pi }=\frac{22}{7}$]

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

The diameter of a wheel is $84 \mathrm{cm}$. How many revolutions will it make to cover $792 \mathrm{m}$? (Use, $\mathrm{\pi }=\frac{22}{7}$)

In the given figure, $ABCD$ is a rectangle inscribed in a circle having length $8 \mathrm{cm}$ and breadth $6 \mathrm{cm}$. If $\pi = 3.14$, then the area of the shaded region is

The circumference of a circle is $22 \mathrm{cm}$. Find its area.

[Take $\mathrm{\pi }=\frac{22}{7}$]