Advertisements
Advertisements
Question
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 28 mm
Solution
Diameter d = 28 mm
Circumference C = πd units
= `22/7 xx 28`
= 22 × 4
= 88 mm
APPEARS IN
RELATED QUESTIONS
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`)
The parallel sides of trapezium are 12 cm and 9cm and the distance between them is 8 cm. Find the area of the trapezium.
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?
The cost of fencing a circular field at the rate of ₹ 240 per meter is ₹ 52,800. The field is to be ploughed at the rate of ₹ 12.50 per m2. Find the cost of pouching the field.
The radii of two circles are 48 cm and 13 cm. Find the area of the circle which has its circumference equal to the difference of the circumferences of the given two circles.
Complete the table below.
Radius (r) | Diameter (d) | Circumference (c) |
7 cm | ______ | _______ |
The diameter of a wheel is 1.4m. How many revolutions does make in moving a distance of 2.2km?
Circumference of a circle of diameter 5 cm is ______.
The circumference of a circle whose area is 81 πr2, is ______.