Manipur Board Solutions for Chapter: Mensuration, Exercise 2: EXERCISE 12.2

Find the sectorial angle and area of the sector of a circle if the arc length of the corresponding sector is $8.8 \mathrm{cm}$ and the radius of the circle is $5.6 \mathrm{cm}$.(use $\mathrm{\pi }=\frac{22}{7}$)

The minute hand of a clock is $4.2 \mathrm{cm}$ long. Find the area swept by it in $20$ minutes. Write the answer in ${\mathrm{cm}}^2$ (round off to two decimal places).(use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of a sector of a circle of radius $14 \mathrm{cm}$ when the sectorial angle is $30°$. Write the answer in ${\mathrm{cm}}^2$ (round off to two decimal places). (use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of a sector of a circle of radius $14 \mathrm{cm}$ when the sectorial angle is $45°$. Write the answer in ${\mathrm{cm}}^2$.(use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of a sector of a circle of radius $14 \mathrm{cm}$ when the sectorial angle is $60°$. Write the answer in ${\mathrm{cm}}^2$ (round off to two decimal places).(use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of a sector of a circle of radius $14 \mathrm{cm}$ when the sectorial angle is $90°$. Write the answer in ${\mathrm{cm}}^2$.(use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of a sector of a circle of radius $14 \mathrm{cm}$ when the sectorial angle is $120°$. Write the answer in ${\mathrm{cm}}^2$ (round off to two decimal places).(use $\mathrm{\pi }=\frac{22}{7}$)

Two concentric circles have radii $6 \mathrm{cm}$ and $4 \mathrm{cm}$. A sector of $60°$ is drawn in each circle. Find the difference between the areas of the two sectors. Write the answer in ${\mathrm{cm}}^2$ (round off to two decimal places). (use $\mathrm{\pi }=3.14$)