Advertisements
Advertisements
प्रश्न
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 72.6 cm |
Advertisements
उत्तर
| Radius (r) | Diameter (d) | Circumference (c) |
| 11.55 cm | 23.1 cm | 72.6 cm |
Explanation:
Circumference, c = 72.6 cm
Now,
c = 2πr ...(where 'r' is the radius)
⇒ 72.6 = `2xx22/7xx"r"`
⇒ r = `72.6xx1/2xx7/22`
⇒ r = `(72.6xx7)/(2xx22)`
⇒ r = `508.2/44`
⇒ r = 11.55
So, radius = 11.55 cm
Diameter, d = 2r
= 2 × 11.55
= 23.1 cm
संबंधित प्रश्न
An arc of a circle is of length 5π cm and the sector it bounds has an area of 20 π cm2. Find the radius of the circle.
A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the costs of the rope, if it cost ₹ 4 per meter. (Take `pi = 22/7`)
Find the diameter of the circle whose area is equal to the sum of the areas of two circles having radii 4 cm and 3 cm.
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is
The area of the circle is given below; find the diameter.
176 sq cm
A wire bent in the form of an equilateral triangle has an area of 121 `sqrt 3` cm2. If the same wire is bent into the form of a circle , find the area enclosed by the wire.
The diameter of a right circular cylinder is 12 m and the slant height is 10 m. Find its curved surface area and the total surface area .
A cylindrical beaker of 7 cm diameter is partly filled with water. Determine the number of spherical marbles of diameter 1.4 cm that are to be submerged in it to raise the water level by 5.6 cm
The diameter of the bullock cart wheel is 1.4 m. Find the distance covered by it in 150 rotations?
Circumferences of two circles are equal. Is it necessary that their areas be equal? Why?
