Find the area of the flower bed (with semicircular ends) as shown in the figure. (Use $\mathrm{\pi }=3.14$)

Find the area of the shaded region shown in the figure, where arcs drawn with centres $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ intersect in pairs at mid-points $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$ of the sides $\mathrm{AB}, \mathrm{BC}, \mathrm{CD}$ and $\mathrm{DA}$ respectively of a square $\mathrm{ABCD}$ where the length of each side of the square is $12 \mathrm{cm}$.(Use $\mathrm{\pi }=3.14$)

In the figure, arcs are drawn by taking vertices $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ of an equilateral triangle of side $10 \mathrm{cm}$ to intersect the sides $\mathrm{BC}, \mathrm{CA}$ and $\mathrm{AB}$ at their mid- points $\mathrm{D}, \mathrm{E}$ and $\mathrm{F}$. Find the area of the shaded region. (Use $\mathrm{\pi }=3.14$)

In the figure, three circles each of radius $3.5 \mathrm{cm}$ are drawn in such a way that each of them touches the other two. Find the area enclosed between these three circles.

The radius of a circle is $20 \mathrm{cm}$. Three more concentric circles are drawn inside it in such a way that it is divided into four parts of equal area. Find the radius of the largest of three concentric circles.

The figure shows two concentric circles with centre $\mathrm{O}$ and radii $7 \mathrm{cm}$ and $14 \mathrm{cm}$. If $\angle \mathrm{AOC}=40°$, find the area of the shaded region.

A chord of a circle of radius $15 \mathrm{cm}$ subtends an angle of $60°$ at centre. Find the areas of the corresponding minor and major segments of the circle. (Use $\mathrm{\pi }=3.14$ and $\sqrt{3}=1.73$)

In the figure, $\mathrm{ABCDEF}$ is a regular hexagon of side $10 \mathrm{cm}$. $\mathrm{O}$ is the centre of the inscribed circle. Find the area of the shaded region.

A copper wire bent in the form of an equilateral triangle has area $121\sqrt{3} {\mathrm{cm}}^2$. If the same wire is bent into the form of a circle, find the area enclosed by the wire.