Advertisements
Advertisements
प्रश्न
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
Advertisements
उत्तर
Length of the wire = 1320 cm
Radius of each circular frame = 7 cm
Circumference of the frame 2πr units = `2 xx 22/7 xx 7 "cm"`
= 2 × 22
= 44 cm
∴ Number of frames made = `"length of the wire"/"circumference of one frame"`
= `1320/44`
= 30
30 frames can be made.
APPEARS IN
संबंधित प्रश्न
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
14 cm
The area of a circle is 49 π cm2. Its circumference is:
The circumference of a circle is equal to the sum of the circumference of two circles having diameters 36 cm and 20 cm. The radius of the new circle is
The diameter of a wheel is 84 cm. How many revolutions will it make to cover 792 m?
A circus tent is cylindrical to a height of 5 m and conical above it. If its diameter is 42 m and slant height of the cone is 53 m, calculate the total area of the canvas required.
A horse is tied with a 21 m laig rope to the corner of a field which is in the shape of an equilateral triangle. Find the area of the field over which it can graze.
Find the volume and the surface area of the spheres in the following :
Radius= 2.1 cm
The radius of two circles are in the ratio 3 : 5, find the ratio between their circumferences.
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm is ______.
