Advertisements
Advertisements
Question
Circumference of a circle of diameter 5 cm is ______.
Options
3.14 cm
31.4 cm
15.7 cm
1.57 cm
Solution
Circumference of a circle of diameter 5 cm is 15.7 cm.
Explanation:
Given, diameter of a circle = 5 cm
∴ Radius = `5/2` cm ......`[∵ "Radius" = "Diameter"/2]`
Now, circumference = 2πr
= `2 xx 22/7 xx 5/2`
= `110/7`
= 15.7 cm
APPEARS IN
RELATED QUESTIONS
In PSR, RTQ and PAQ are three semicircles of diameters 10 cm, 3 cm and 7 cm respectively. Find the perimeter of the shaded region. [Use π=3.14]
The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour? [Use Π = 22/7]
ABC is an isosceles right-angled triangle with ∠ABC = 90°. A semi-circle is drawn with AC as the diameter. If AB = BC = 7 cm, find the area of the shaded region. [Take π = 22/7]
Find in terms of x the length of the arc that subtends an angle of 30°, at the centre of circle of radius 4 cm.
A playground has the shape of rectangle, with two semicircles on its smaller sides as diameters, added to its outside. If the sides of rectangle are 36m and 24.5m. find the area of playground.
Find the area of a quadrant of a circle whose circumference is 88 cm.
Find the curved surface area , the total surface area and the volume of a cone if its :
Height = 16 cm , diameter = 24 cm
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 28 mm
Areas of two circles are equal. Is it necessary that their circumferences are equal? Why?
Value of π is ______ approximately.
