Advertisements
Advertisements
प्रश्न
Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)
Advertisements
उत्तर
Radius of outer circle = 19 m
Circumference = 2πr
= 2 × 3.14 × 19
= 119.32 m
Radius of inner circle = 19 − 10
= 9 m
Circumference = 2πr
= 2 × 3.14 × 9
= 56.52 m
APPEARS IN
संबंधित प्रश्न
A pendulum swings through an angle of 30º and describes an arc 8.8 cm in length. Find the length of the pendulum.
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
The side of a square is 10 cm. Find the area of the circumscribed circle. [Take π = 3.14.]
A boy is cycling in such a way that the wheels of his bicycle are making 140 revolutions per minute. If the diameter of a wheel is 60 cm, calculate the speed (in km/hr) at which the boy is cycling.
The diameter of a cycle wheel is `4 5/11` cm. How many revolution will it make in moving 6.3 km ?
A wire when bent in the form of a square encloses an area of 484 cm2. If the same wire is bent into the form of a circle, find the area of the circle.
The radius of two circles are in the ratio 3 : 5, find the ratio between their circumferences.
A wire bent in the form of an equilateral triangle has an area of `121sqrt(3)"cm"^2`. If the same wire is bent into the form of a circle, find the area enclosed by the wire.
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
The cost of decorating the circumference of a circular lawn of a house at the rate of ₹ 55 per metre is ₹ 16940. What is the radius of the lawn?
