Question Text
Question 1 :
A rectangular sheet of acrylic is 50 cm by 25 cm . From it 60 circular buttons, each of diameter 2.8 cm have been cut out. The area of the remaining sheet is
Question 2 :
The area of a circle is $24.64$. $\displaystyle m^{2}$ What is the circumference of the circle ?
Question 3 :
The region between an arc and two radii joining the centre to the end points of the arc is called
Question 4 :
A circular disc of radius $10 cm$ is divided into sectors with angles $120^o$ and $150^o$, then the ratio of the area of two sectors is
Question 5 :
A roller of diameter 70 cm and length 2m is rolling on the ground What is the area covered by the roller in 50 revolutions?
Question 6 :
If a circle is divided into two equal parts, then equal part of the circle is called ________.
Question 7 :
If the radius of a circle increased by 20% then the corresponding increase in the area of circle is ................
Question 8 :
A wire of length $36$ cm is bent in the form of a semicircle. What is the radius of the semicircle?
Question 9 :
The area of two circles are in the ratio $25 : 36$. Then the ratio of their circumference is _________.
Question 10 :
The radius of a circle whose area is equal to the sum of the areas of two circles where radii are 5 cm and 12 cm is
