Advertisements
Advertisements
प्रश्न
The circumferences of two circles are in the ratio 5: 7, find the ratio between their radius.
Advertisements
उत्तर
The ratio of the circumference of the circle = 5: 7
Let circumference of the first ratio = 5x
∴ 2πr = 5x
⇒ r =`(5"x")/(2π)`
and the circumference of the second ratio = 7x
∴ 2πr = 7x
⇒ r = `(7"x")/(2π)`
The ratio between their radius =`(5"x")/(2π):(7"x")/(2π)`
= 5: 7
APPEARS IN
संबंधित प्रश्न
The sum of the radii of two circles is 140 cm and the difference of their circumferences in 88 cm. Find the diameters of the circles.
A rectangular piece is 20m long and 15m wide from its four corners, quadrants of 3.5m radius have been cut. Find the area of remaining part.
In the given figure, the shape of the top of a table is that of a sector of a circle with centre O and ∠AOB = 90°. If AO = OB = 42 cm, then find the perimeter of the top of the table.
In a circle of radius 10.5 cm, the minor arc is one-fifth of the major arc. Find the area of the sector corresponding to the major arc.
The base circumferences of two cones are the same. If their slant heights are in the ratio 5 : 4, find the ratio of their curved surface areas.
The diameter of a cycle wheel is `4(5)/(11)"cm"`. How many revolutions will it make in moving 6.3km?
The perimeter of a sector of radius 5.2 cm is 16.4 cm, the area of the sector is ____________.
The diameter of a wheel is 1.26 m. The distance traveled in 500 revolutions is ____________.
Ratio of the circumference of a circle to its diameter is denoted by symbol ______.
