Question Text
Question 1 :
$r$ is the radius and $l$  is the length of an arc. The area of a sector is ______.
Question 2 :
If the radius and arc length of a sector are 17 cm and 27 cm respectively, then the perimeter is
Question 3 :
If the radius of a circle is tripled, the ares becomes.
Question 4 :
The region between an arc and two radii joining the centre to the end points of the arc is called
Question 6 :
The number of circular pipes with an inside diameter of $1$ cm which will carry the same amount of water as a pipe with an inside diameter of $6$ cm is:
Question 7 :
A rope by which a cow is tethered is in reased from 16m to 23m. How much additional ground does it have to graze now?
Question 8 :
The diameter of a circle is divided into n equal parts.On each part a semicircle is constructed. as n becomes very large, the sum of the lengths of the arcs of the semicircles approaches a length:
Question 9 :
Circular dome is a 3D example of which kind of sector of the circle?
Question 10 :
If radius of a circle is increased to twice its original length, how much will the area of the circle increase ?
Question 11 :
The distance between the two parallel chords of length 8 cm and 6 cm in a circle of diameter 10 cm if the chords lic on the same side of the centre is
Question 12 :
The area of a circle is $24.64$. $\displaystyle m^{2}$ What is the circumference of the circle ?
Question 15 :
The perimeter of a sector of a circle is 37cm. If its radius is 7cm, then its arc length is