Advertisements
Advertisements
प्रश्न
The diameter of a circle is 20 cm. Taking π = 3.14, find the circumference and its area.
उत्तर
Diameter of circle (d) = 20 cm
∴ Circumference = dπ = 20 × 3.14 = 62.8 cm
Radius (r) =
∴ Area of a circle = πr2
= 3.14 × 10 × 10 = 314 cm2
APPEARS IN
संबंधित प्रश्न
In the figure given below, find the area of shaded region: (All measurements are in cm)
The base of a parallelogram is thrice it height. If its area is 768 cm2, find the base and the height of the parallelogram.
Find the height of a triangle whose base is 18 cm and the area is 270 cm2.
The area of a right-angled triangle is 160 cm2. If its one leg is 16 cm long, find the length of the other leg.
Find the area of a right-angled triangle whose hypotenuse is 13 cm long and one of its legs is 12 cm long.
The sides of a triangle are 21 cm, 17 cm, and 10 cm. Find its area.
The legs of a right-angled triangle are in the ratio 4 : 3 and its area is 4056 cm2. Find the length of its legs.
The sides of a triangle are in the ratio 15 : 13 : 14 and its perimeter is 168 cm. Find the area of the triangle.
A metal wire, when bent in the form of a square of largest area, encloses an area of 484 cm2. Find the length of the wire. If the same wire is bent to the largest circle, find:
(i) radius of the circle formed.
(ii) area of the circle.
The length and breadth of a rectangular paper are 35 cm and 22 cm. Find the area of the largest circle which can be cut out of this paper.
