Advertisements
Advertisements
प्रश्न
Circumference of a circle disc is 88 cm. Its radius is ______.
विकल्प
8 cm
11 cm
14 cm
44 cm
Advertisements
उत्तर
Circumference of a circle disc is 88 cm. Its radius is 14 cm.
Explanation:
We know that, circumference = 2πr
⇒ `88 = 2 xx 22/7 xx r`
⇒ `r = (88 xx 7)/(2 xx 22)` ...[∵ Circumference = 88 cm, given]
⇒ r = 14 cm
Hence, the radius is 14 cm.
APPEARS IN
संबंधित प्रश्न
From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Take π = 3.14)
Find the angle subtended at the centre of circle of radius ‘a’ cm by an arc of length
`(api)/4` 𝑐𝑚
A wire when bent in the form of an equilateral triangle encloses an area of `121sqrt(3) "cm"^2`. The same wire is bent to form a circle. Find the area enclosed by the circle.
In the given figure, ABCD is a trapezium of area 24.5 cm2 , If AD || BC, ∠DAB = 90°, AD = 10 cm, BC = 4 cm and ABE is quadrant of a circle, then find the area of the shaded region.
PQRS is a diameter of a circle of radius 6 cm. The lengths PQ, QR and RS are equal. Semicircles are drawn with PQ and QS as diameters, as shown in the given figure. If PS = 12 cm, find the perimeter and area of the shaded region.
OACB is a quadrant of a circle with centre O and its radius is 3.5 cm. If OD = 2 cm. find the area of
- quadrant OACB
- the shaded region.
The circumference of a garden roller is 280 cm. How many revolutions does it make in moving 490 meters?
Each wheel of a car is of diameter 80 cm. How many completer revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour?
The diameter of a wheel is 1.4m. How many revolutions does make in moving a distance of 2.2km?
Find the circumference of the circle whose area is 25times the area of the circle with radius 7cm.
