Advertisements
Advertisements
प्रश्न
Find the area enclosed between two concentric circles, If their radii are 6cm and 13cm respectively.
Advertisements
उत्तर
We know,
The area of the ring between two concentric circles equals the area of the larger circle minus the area of smaller circle. Let the radius of the outer and inner ring be R and r respectively.
Here, the radius of the outer circle
= 13cm and the radius of the inner circle
= 6cm
The Area of a Circle with radius r = πr2
The area of the ring = π(13)2 - 62)
= `(22)/(7)(169 - 36)`
= `(22)/(7)(133)`
= 22 x 9
= 418cm2.
APPEARS IN
संबंधित प्रश्न
The area of rectangle is `192cm^2` and its perimeter is 56 cm. Find the dimensions of the rectangle.
Find the area of the quadrilateral ABCD in which AD = 24 cm, ∠BAD 90° and ∠BCD is an equilateral triangle having each side equal to 26 cm. Also, find the perimeter of the quadrilateral.
In Figure 5, a circle is inscribed in a triangle PQR with PQ = 10 cm, QR = 8 cm and PR =12 cm. Find the lengths of QM, RN and PL ?
If the numerical value of the area of a circle is equal to the numerical value of its circumference , find its radius.
The perimeter of a certain sector of a circle of radius 6.5 cm in 31 cm. Find the area of the sector.
In the given figure, OABC is a quadrant of a circle of radius 3.5 cm with centre O. If OD = 2 cm, find the area of the shaded portion.
A square is inscribed in a circle of radius 7 cm. Find the area of the square.
A circle of the largest area is cut from a rectangular piece of cardboard with dimensions 55 cm and 42 cm. Find the ratio between the area of the circle cut and the area of the remaining card-board.
In the following figure, a rectangle ABCD enclosed three circles. If BC = 14 cm, find the area of the shaded portion (Take π = 22/7)
Find the area of the shaded region:
