Advertisements
Advertisements
Question
If the circumference of a circle is 82π, then the value of ‘r’ is
Options
41 cm
82 cm
21 cm
20 cm
Advertisements
Solution
If the circumference of a circle is 82π, then the value of ‘r’ is 41 cm
APPEARS IN
RELATED QUESTIONS
In Fig. 6, find the area of the shaded region, enclosed between two concentric circles of radii 7 cm and 14 cm where ∠AOC = 40°. (use `pi = 22/7`)
Choose the correct alternative answer for the following question.
Find the perimeter of the shaded region in the figure, if ABCD is a square of side 14 cm and APB and CPD are semicircles.
The difference between the circumference and radius of a circle is 37 cm. The area of the circle is ______.
Find the area and perimeter of the circle with the following :
Radius= 10.5 cm
An express train is running between two stations with a uniform speed. If the diameter of each wheel of the train is 42 cm and each wheel makes 1200 revolutions per minute, find the speed of the train.
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 perimeter of circular and square fields is equal. If the area of the square field is 484 m2 then the diameter of the circular field is ____________.
Length of tape required to cover the edges of a semicircular disc of radius 10 cm is ______.
Value of π is ______ approximately.
