Related Questions

The radius of circle A is r, and the radius of circle B is 3/4r. What is the ratio of the area of circle A to the area of circle B?
A 16 to 9
B 9 to 16
C 1 to 4
D 4 to 3
The ratio of the area of area of a circle to the radius of the radius of the circle is--
A π
B 2π
C π2
D none of these
Radius of circle center 0 is 3 times the radius of circle center C. Angle ACB -A angle POQ. If the shaded are of circle C is 2 then what is the area of then shaded part of circleO?
A 36
B 9
C 12
D 18
The area of circle A is 6.25 sq. in. If radius of the circle is doubled, what is the new area of circle A in sq. in?
A 5 pi
B 12.5 pi
C 25 pi
D 39.0625 pi
ABCD is a square of side 10. AFC is an are of a circle with the center at D and radius 10. AGC is an are of a circle with the center at B and radius 10. Find the area of AFCG/
A 50 -100pie
B 25 -100 pie
C 100-25 pie
D 100-50pie
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
A sinɸ
B cosɸ
C secɸ
D cosecɸ
If the ratio of the area of a sector to the area of the circle is 3 : 5, what is the ratio of the length of the are in the sector to the circumference of the circle?
A 35
B 27
C 13
D 12
If the ratio of the area of a sector to the area of the circle is 3:5. What is the ratio of the legth of theare in the sector to the circumference of the circle?
A 3/5
B 2/7
C 1/3
D 1/2
If the ratio of the area of a sector to the area of the circle is 3: 5, What is the ratio of the length of the arc in the sector to the circumference of the circle?
A 3/5
B 2/7
C 1/3
D 1/2
A circle and a square have same area Therefore the ratio of the side of the square and the radius of the circle is ______ .
A π:1 
B   1:π 
C   1 : π
D  π:1 

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