Advertisements
Advertisements
рдкреНрд░рд╢реНрди
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
14 cm
рдЙрддреНрддрд░
r = 14 cm
Circumference = 2πr
= `2 xx 22/7 xx 14`
= 88 cm
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
In Fig. 6, find the area of the shaded region, enclosed between two concentric circles of radii 7 cm and 14 cm where ∠AOC = 40°. (use `pi = 22/7`)
An elastic belt is placed around the rim of a pulley of radius 5 cm. (Fig. 10) From one point C on the belt, the elastic belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from the point O. Find the length of the belt that is still in contact with the pulley. Also find the shaded area (use π = 3.14 and `sqrt3=1.73)`
A sector is cut from a circle of radius 21 cm. The angle of the sector is 150º. Find the length of its arc and area.
A horse is placed for grazing inside a rectangular field 70 m by 52 m. It is tethered to one corner by a rope 21 m long. On how much area can it graze? How much area is left ungrazed?
A wire bent in the form of an equilateral triangle has an area of 121 `sqrt 3` cm2. If the same wire is bent into the form of a circle , find the area enclosed by the wire.
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 56 m
Find the circumference of the circles whose radii are given below.
49 cm
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
Circumference of a circle of diameter 5 cm is ______.
A photograph of Billiard/Snooker table has dimensions as `1/10`th of its actual size as shown in the given figure:
The portion excluding six holes each of diameter 0.5 cm needs to be polished at rate of тВ╣ 200 per m2. Find the cost of polishing.
