Advertisements
Advertisements
प्रश्न
The circumference of a circle is eigth time the circumference of the circle with a radius of 12 cm. Find its diameter.
Advertisements
उत्तर
Let the radius of the bigger circle = R, and Let the radius of the smaller circle = r.
r = 12 cm
According to the problem,
2πR = 8 × 2πr
2πR = 8 × 2π × 12
R = `(8 xx 2pi xx 12)/(2pi)`
R = 8 × 12
R = 96
Diameter = 2 × 96
= 192 cm
APPEARS IN
संबंधित प्रश्न
In Fig. 2, a circle is inscribed in a ΔABC, such that it touches the sides AB, BC and CA at points D, E and F respectively. If the lengths of sides AB, BC and CA and 12 cm, 8 cm and 10 cm respectively, find the lengths of AD, BE and CF.
A wire is looped in the form of a circle of radius 28 cm. It is re-bent into a square form. Determine the length of the side of the square.
In the given figure, O is the centre of the sector. \[\angle\]ROQ = \[\angle\]MON = 60° . OR = 7 cm, and OM = 21 cm. Find the lengths of arc RXQ and arc MYN. (\[\pi = \frac{22}{7}\])
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
Find the area of the sector of a circle having radius 6 cm and of angle 30°. [Take π = 3.14.]
A square ABCD is inscribed in a circle of radius r. Find the area of the square.
There are two circular gardens A and B. The circumference of garden A is 1.760 km and the area of garden B is 25 times the area of garden A. Find the circumference of garden B.
The circumferences of two circles are in the ratio 5: 7, find the ratio between their radius.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | 28 cm | ...... |
The diameter of a circle is 5.6 cm. Find its circumference.
