Question 1 :
The angle of sector with area equal to one fifth of total area of whole circle 
Question 2 :
The length of minor arc $\widehat {AB}$ of a circle with radius $7$ units  is $14$. Find the length of major arc $\widehat {AB}$.
Question 3 :
If a sector of a circle of diameter 21 cm subtends an angle of $120^{\circ}$ at the centre, then what is its area ? 
Question 4 :
The angle subtended at the centre of a circle of radius $3cm$ by an arc of length $1cm$ is:
Question 5 :
Find the area of sector whose length is $30\ \pi$ cm and angles of the sector is $40^o$.
Question 6 :
How long is the arc subtended by an angle of $\dfrac{2\pi}{3}$ radians on a circle of radius $12$ cm?<br/>
Question 7 :
If the sector of a circle of diameter $14 cm$ subtends an angle of $30^{\circ}$ at the centre, then its area is
Question 8 :
The radius of a circle is $7 cm$, then area of the sector of this circle if the corresponding angle is:$210^{\circ}$ is <br/><br/>
Question 9 :
The number of revolutions a wheel of diameter $40 cm$ makes in travelling a distance of $176 m$ is $\displaystyle \left ( \pi =\frac{22}{7} \right )$
Question 10 :
The perimeter and area of a sector are $18\;cm$ and $20\;sq.\,cm$ respectively. Then the length of the arc is:
Question 11 :
If the area of a sector of a circle is $\dfrac{5}{18}$th of the area of that circle, then the central angle of the sector is 100. Is it true or false?
Question 12 :
If the circumference of a circle is reduced by $50\%$ the area of the circle is reduced by:
Question 13 :
A sphere with diameter $50$ cm intersects a plane $14$ cm from the center of the sphere. What is the number of square centimeters in the area of the circle formed?
Question 14 :
If a bicycle wheel makes $5000$ revolution in moving $11$ km, then diameter of wheel is
Question 15 :
The ratio of the slant height of two right cones of equal base is 3 : 2 then the ratio of their volumes is <br>