Advertisements
Advertisements
प्रश्न
Find the diameter of a circle whose circumference is equal to the sum of circumference of circles with radius 10 cm, 12 cm, and 18 cm.
Advertisements
उत्तर
Let the radius of the circle = R cm
∴ 2πR = 2π × 10 + 2π × 12 + 2π × 18
On dividing each term by 2π, we get:
R = 10 + 12 + 18 = 40 cm
∴ Radius of the circle obtained = 40 cm
And, its diameter = 2 × Radius
= 2 × 40 cm = 80 cm
APPEARS IN
संबंधित प्रश्न
Given figure depicts an archery target marked with its five scoring areas from the centre outwards as Gold, Red, Blue, Black and White. The diameter of the region representing Gold score is 21 cm and each of the other bands is 10.5 cm wide. Find the area of each of the five scoring regions. [use π = 22/7]
In the given figure, the side of square is 28 cm and radius of each circle is half of the length of the side of the square where O and O' are centres of the circles. Find the area of shaded region.
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)
The radii of two circles are 19 cm and 9 cm, Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles.
The areas of two circles are in the ratio 9 : 4. The ratio of their circumferences is
A metal wire, when bent in the form of an equilateral triangle of largest area, encloses an area of 484 `sqrt3` cm2. If the same wire is bent into the form of a circle of largest area, find the area of this circle.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 72.6 cm |
Find the radius and area of the circle which has circumference equal to the sum of circumferences of the two circles of radii 3 cm and 4 cm respectively.
What is the circumference of a circle of diameter 10 cm (Take π = 3.14)?
Find the circumference of the circles whose radii are given below.
91 mm
