If the perimeter and area of a circle are numerically equal , then the radius of the circle is:
2 Units
π Units
4 Units
7 Units
If the ratio of the radii of the two wheel is 3 : 4 , then the ratio of their circumference is:
3 : 5
3 : 4
3 : 6
4 : 3
The length of a minor arc is 2/9 of the circumference of the circle. Then , the measure of the angle subtended by the arc at the centre of the circle is:
80o
60o
45o
30o
A chord of a circle of radius 14 cm subtends a right angle at the centre. Then , the area of the minor sector is :
154 cm2
156 cm2
158 cm2
160 cm2
The difference between the radii of the smaller circle and the bigger circle is 7cm and the difference between the areas of the two circles is 1078 cm2. Then , the radius of the smaller circle is
17.5 cm
21 cm
28 cm
30 cm
Area of sector of a circle with radius R and of angle P is
π
A wheel makes 1000 revolutions in covering a distance of 88 km. Then , the diameter o the wheel is:
14 m
24 m
28 m
40 m
The area between two concentric circles having radii 70 cm and 50 cm is:
7547 cm2
75540 cm2
7540 cm2
7543 cm2
If an arc makes an angles of 72o at the centre of a circle of radius 10 cm, then its length is:
6π cm
4π cm
7π cm
8π cm
The perimeter of a sector of angle 45o of a circle with radius 7 cm is:
19.00 cm
19.5 cm
18.5 cm
20 cm