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
Four equal circles each of radius a, touch each other. Show that area between them is `6/7a^2`
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/h) at which the boy is cycling.
The perimeter of a sector of a circle of radius 5.6 cm is 27.2 cm. Find the area of the sector.
Find the area and perimeter of the circle with the following:
Diameter= 35 cm
Find the circumference of the circle whose area is 81π cm 2.
A cylindrical bucket, whose base radius is 20 cm, is filled with water to a height of 25 cm. A heavy iron spherical ball of radius 10 cm is dropped to submerge completely in water in the bucket. Find the increase in the level of water.
A solid sphere metal is cut through its centre into 2 equal parts. If the diameter of the sphere is 3`1/3` cm , find the total surface of each part, correct to two decimal places.
In the given figure, the area of the shaded portion is 770 cm2. If the circumference of the outer circle is 132 cm, find the width of the shaded portion.
A ground is in the form of a circle whose diameter is 350 m. An athlete makes 4 revolutions. Find the distance covered by the athlete
Circumference of a circle is always ______.
