English
Maharashtra State BoardSSC (English Medium) 10th Standard

The radius of a circle is 7 cm. find the circumference of the circle.

Advertisements
Advertisements

Question

The radius of a circle is 7 cm. find the circumference of the circle.

Advertisements

Solution

Given radius of a circle r = 7cm

Circumference of a circle = 2πr

`= 2 xx (22/7) xx 7`

= 2 × 22

= 44cm

shaalaa.com
  Is there an error in this question or solution?
2013-2014 (March)

APPEARS IN

RELATED QUESTIONS

A race track is in the form of a ring whose inner circumference is 352 m, and the outer circumference is 396 m. Find the width of the track.


Find the area of circle whose circumference is 44 cm.


The circumference of a circle is 39.6 cm. Find its area.


The length of a chain used as the boundary of a semicircular park is 108 m. Find the area of the park.


The sum of the radii of two circles is 7 cm, and the difference of their circumferences is 8 cm. Find the circumference of the circles.


The area of a square is the same as the area of a square. Their perimeters are in the ratio


OACB is a quadrant of a circle with centre O and its radius is 3.5 cm. If OD = 2 cm. find the area of

  1. quadrant OACB 
  2. the shaded region.


Find the area and perimeter of the circle with the following :

Radius= 2.8 cm 


Find the curved surface area , the total surface area and the volume of a cone if its : 

Height = 16 cm , diameter = 24 cm


Find the area enclosed between two concentric circles, if their radii are 6 cm and 13 cm respectively. 


The sum of the circumference and diameter of a circle is 116 cm. Find its radius. 


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.


The perimeter of a square and the circumference of a circle are equal. If the length of each side of the square is 22 cm, find:
(i) perimeter of the square.
(ii) circumference of the circle.
(iii) radius of the circle.


The inner circumference of a circular track is 264 m and the width of the track is 7 m. Find:
(i) the radius of the inner track.
(ii) the radius of the outer circumference.
(iii) the length of the outer circumference.
(iv) the cost of fencing the outer circumference at the rate of ₹50 per m.


The speed of a car is 66km per hour. If each wheel of the car is 140cm in diameter, find the number if revolution made by each wheel per minute.


A cart wheel makes 9 revolutions per second. If the diameter of the wheel is 42cm, find its speed in km per hour. (Answer correct to the nearest km)


A wire when bent in the form of a square encloses an area of 484cm2. If the same wire is bent into the form of a circle, find the area of the circle.


Find the circumference of the circle whose area is 25times the area of the circle with radius 7cm.


The cost of fencing a circular race course at the rate of ₹ 8 per metre is ₹ 2112. Find the diameter of the race course


In covering a distance s metres, a circular wheel of radius r metres makes `s/(2πr)` revolutions. Is this statement true? Why?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×