Advertisements
Advertisements
प्रश्न
Find the area of the following circles, given that radius = 5 cm.
Advertisements
उत्तर
r = 5 cm
Area = `pir^2`
= `22/7 xx 5 xx 5`
= `550/7`
= 78.57 cm2
APPEARS IN
संबंधित प्रश्न
The circumference of a circle is 31.4 cm. Find the radius and the area of the circle? (Take π = 3.14)
In the following figure, the square ABCD is divided into five equal parts, all having same area. The central part is circular and the ines AE, GC, BF and HD lie along the diagonals AC and BD of the square. If AB = 22 cm, find:
the circumference of the central part.
In the following figure a square OABC is inscribed in a quadrant OPBQ of a circle. If OA = 21 cm, find the area of the shaded region.
In the following figure, there are three semicircles, A, B and C having diameter 3 cm each, and another semicircle E having a circle D with diameter 4.5 cm are shown. Calculate:
(i) the area of the shaded region
(ii) the cost of painting the shaded region at the rate of 25 paise per cm2 , to the nearest rupee.
The area of incircle of an equilateral triangle is 154 cm2 . The perimeter of the triangle is
The area of a sector whose perimeter is four times its radius r units, is
Find the area of the shaded region in the given figure, if ABCD is a rectangle with sides 8 cm and 6 cm and O is the centre of the circle.
On increasing the diameter of a circle by 40%, its area will be increased by
In the given figure, the sectors of two concentric circles of radii 7 cm and 3.5 cm are shown. Find the area of the shaded region.
A table top is semicircular in shape with diameter 2.8 m. Area of this table top is ______.
