The area of a circle is increased by 22cm2 , when its radius is increased by 1 cm. The original radius of the circle is:
6 cm
3.2 cm
3 cm
3.5 cm
Area of sector of a circle with radius R and of angle P is
π
The difference between the circumference and radius of a circle is 37 cm. Then area of the circle is
111 cm2
184 cm2
154 cm2
259 cm2
If the perimeter of a semicircular protractor is 36 cm , then its diameter is:
20 cm
18 cm
14 cm
8 cm
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
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 perimeter of a sector of angle 45o of a circle with radius 7 cm is:
19.00 cm
19.5 cm
18.5 cm
A horse is tied to a pole with 28 m long string. The area where the horse can graze is:
2460 m2
2464 m2
2500 m2
2570 m2
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
The length of a minute hand on a wall clock is 7 cm. Then the area swept by it in 30 minutes is:
210 cm2
147 cm2
77 cm2
