Find the area of the shaded region in the figure given below, in which two circles with centres $A$ and $B$ touch each other at the point $C$. If$AC=8 \mathrm{cm}$ and $AB=3 \mathrm{cm}$.

If the length of a side of the square is equal to that of the diameter of a circle, then the ratio of the area of the square and that of the circle is:

$\left(\pi =\frac{22}{7}\right)$

A spherical ball of diameter $35 \mathrm{cm}$ rolls $20$ times. How much is the distance (in $\mathrm{m}$) covered by it?

(Take $\pi =\frac{22}{7}$)

Find the area in square centimeter of the shaded region in the given figure, where $ABCD$ is a square of side $14 \mathrm{cm}$. [Take $\pi =\frac{22}{7}$]

A wire when bent in the form of a square encloses an area of $484 sq. cm$. If the same wire is bent in the form of a circle, what is the area enclosed by it?