Advertisements
Advertisements
प्रश्न
Shazli took a wire of length 44 cm and bent it into the shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, the circle or the square? (Take `pi = 22/7`)
Advertisements
उत्तर
Circumference = `2pir` = 44 cm
`2 xx 22/7xx r = 44`
r = 7 cm
Area = `pir^2`
= `22/7xx 7 xx 7`
= 154 cm2
If the wire is bent into a square, then the length of each side would be = `44/4`
= 11 cm
area of square = (11)2
= 121 cm2
As 154 > 121
Therefore, circle encloses more area.
APPEARS IN
संबंधित प्रश्न
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
28 mm
A steel wire when bent is the form of square encloses an area of 12 cm2. If the same wire is bent in form of circle. Find the area of circle.
The parallel sides of trapezium are 12 cm and 9cm and the distance between them is 8 cm. Find the area of the trapezium.
In the given figure, if A(P-ABC) = 154 cm2 radius of the circle is 14 cm, find
(1) `∠APC`
(2) l ( arc ABC) .
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
Find the area of a quadrant of a circle whose circumference is 88 cm.
Find the circumference of the circle whose area is 81π cm 2.
Find the volume and the surface area of the spheres in the following :
Radius= 2.1 cm
Find the area and perimeter of the circles with following: Radius = 10.5cm
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.
