Advertisements
Advertisements
प्रश्न
The diameter of a circle is 28 cm.
Find its :
(i) Circumference
(ii) Area.
Advertisements
उत्तर
Let r be the radius of the circle.
(i) 2r = 28 cm
circumference = 2πr
= 28π cm
= 88 cm
(ii) area = πr2
= π `(28/2)^2`
= 196π cm2
= 616 cm2
APPEARS IN
संबंधित प्रश्न
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find Area of the circle
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
The radius of the wheel of a vehicle is 42 cm. How many revolutions will it complete in a 19.8-km-long journey?
Find the area and perimeter of the following sector :
Radius= 4.2 cm, angle at the centre is 60 °
Find the area and perimeter of the circles with following: Diameter = 77cm
Find the area and perimeter of the following semicircles: Radius = 1.4cm
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.
The diameter of a circular well is 4.2 m. What is its circumference?
Circumference of a circle is always ______.
Ishika has designed a small oval race track for her remote control car. Her design is shown in the figure. What is the total distance around the track? Round your answer to the nearest whole cm.
