Advertisements
Advertisements
Question
Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)
Advertisements
Solution
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
RELATED QUESTIONS
Three semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
PQRS is a diameter of a circle of radius 6 cm. The lengths PQ, QR and RS are equal. Semicircles are drawn with PQ and QS as diameters, as shown in the given figure. If PS = 12 cm, find the perimeter and area of the shaded region.
A wire is in the form of a circle of radius 42 cm. It is bent into a square.
Determine the side of the square and compare the area of the regions enclosed in two cases.
The wheel of the car makes 10 revolutions per second. If its diameter is 70 cm, find the speed of the car in km per hour.
Find the volume and the surface area of the spheres in the following :
Radius= 2.1 cm
Find the volume and the surface area of the spheres in the following :
Radius = 7 cm
The wheel of a bullock cart has a diameter of 1.4 m. How many rotations will the wheel complete as the cart travels 1.1 km?
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq.m. Find the area of the circle.
