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

The circumference of a circle exceeds the diameter by $16.8 \mathrm{cm}$. Find the circumference of the circle.

A horse is tied to a pole with $28 \mathrm{m}$ long string. Find the area where the horse can graze.

A steel wire when bent in the form of a square encloses an area of $121 {\text{cm}}^2$. If the same wire is bent in the form of a circle, find the area of the circle.

The circumferences of two circles are in the ratio $2:3$. Find the ratio of their areas.

Find the radius of a circle whose circumference is equal to the sum of the circumference of two circles of radii $15 \text{cm}$ and $18 \text{cm}$.

The radii of two circles are $8 \mathrm{cm}$ and $6 \mathrm{cm}$, respectively. Find the radius of the circle having its area equal to the sum of the areas of the two circles.

The radii of two circles are $19 \mathrm{cm}$ and $9 \mathrm{cm}$, respectively. Find the radius and area of the circles which has it circumference equal to the sum of the circumferences of the two circles.