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
In the given figure, two concentric circles with centre O, have radii 21 cm and 42 cm. If ∠AOB = 60°, find the area of the shaded region. [Use `π = 22/7`.]
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
28 mm
Find the circumference and area of circle of radius 4.2 cm
An arc of length 15 cm subtends an angle of 45° at the centre of a circle. Find in terms of 𝜋, radius of the circle.
In a circle of radius 10.5 cm, the minor arc is one-fifth of the major arc. Find the area of the sector corresponding to the major arc.
Find the area of a quadrant of a circle whose circumference is 88 cm.
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.
What is the circumference of a circle of diameter 10 cm (Take π = 3.14)?
Circumferences of two circles are equal. Is it necessary that their areas be equal? Why?
Find the area of the shaded region given in figure
