Advertisements
Advertisements
प्रश्न
The radius of two circles are 20 cm and 13 cm. Find the difference between their circumferences. (Take π =`22/7`)
Advertisements
उत्तर
Radius of 1st circle = 20 cm
Circumference of the circle = 2πr
= `2xx22/7xx20`
= `40 xx 22/7`
= 125.7 cm
The radius of 2nd circle = 13 cm
Circumference of the circle = 2πr
= `2xx22/7xx13`
= `26 xx 22/7`
= 81.7
∴ The difference of circumference of two circles
= 125.7 − 81.7 cm = 44 cm
APPEARS IN
संबंधित प्रश्न
Find the area of the sector of a circle whose radius is 14 cm and angle of sector is 45º
An elastic belt is placed round the rim of a pulley of radius 5 cm. One point on the belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from O. Find the length
of the belt that is in contact with the rim of the pulley. Also, find the shaded area.
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
Four equal circles, each of radius 5 cm touch each other as shown in fig. Find the area included etween them.
Two circular pieces of equal radii and maximum area, touching each other are cut out from a rectangular cardboard of dimensions 14 cm × 7 cm. Find the area of the remaining cardboard.
The circumference of a circle is 39.6 cm. Find its area.
The wheels of a car make 2500 revolutions in covering a distance of 4.95 km. Find the diameter of a wheel.
Four equal circles are described about the four corners of a square so that each touches two of the others, as shown in the figure. Find the area of the shaded region, if each side of the square measures 14 cm.
The perimeter of a circular field is 242 m. The area of the field is ______.
Find the perimeter of the given shape (Take π = `22/7`).
