1.
If the radius of a circle is diminished by 10%, then its area is diminished by:
2.
PQRS is a square land of side 28 m. Two semicircular grass covered portions are to be made on two of its opposite sides as shown in the figure. How much area will be left uncovered? (Take π= 22/7)
3.
The difference between the circumference and radius of a circle is 74 cm then the area of circle is:
4.
The circumference of a circle is 100 cm, then the side of a square inscribed in the circle is:
5.
If the circumference of two circles are in the ratio 2 : 3 then the ratio of their areas is:
6.
In the following figure, OAPB is a sector of a circle of radius 3.5 cm with the centre at O and angle AOB = 120°. Find the length of OAPBO.
7.
If the circumference of a circle increases from 4π to 8π, then its area increases by:
8.
Find the area of the shaded region of the given figure, if the diameter of the circle with centre O is 28 cm and AQ = 1/4 AB.
9.
Read the Question given below
10.
The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.
11.
Read the Question given below
12.
In the following figure, two circular flower beds have been shown on two sides of a square lawn ABCD of side 56 m. If the centre of each circular flower bed is the point of intersection O of the diagonals of the square lawn, find the sum of the areas of the lawn and the flower beds.
13.
The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour ?
14.
The area of the largest triangle that can be inscribed in a semicircle of radius r is:
15.
If the circumference and area of a circle are numerically equal, then the diameter of the circle is:
