Advertisements
Advertisements
प्रश्न
The circumference of a circular field is 308 m. Find is:
(i) Radius
(ii) Area.
Advertisements
उत्तर
Let r be the radius of the circular field
(i) 2πr = 308
⇒ r = `[308]/ [2π]`
⇒ r = `(308)/(2) xx (7)/(22)`
⇒ r = 49 m
(ii) area = πr2
= `22/7 xx ( 49 )^2`
= 7546 m2
APPEARS IN
संबंधित प्रश्न
In the figure given below, PQRS is square lawn with side PQ = 42 metres. Two circular flower beds are there on the sides PS and QR with centre at O, the intersections of its
diagonals. Find the total area of the two flower beds (shaded parts).
A playground has the shape of rectangle, with two semicircles on its smaller sides as diameters, added to its outside. If the sides of rectangle are 36m and 24.5m. find the area of playground.
Four equal circles, each of radius 5 cm touch each other as shown in fig. Find the area included etween them.
Four equal circles each of radius a, touch each other. Show that area between them is `6/7a^2`
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.
Find the area and perimeter of the circle with the following:
Diameter= 35 cm
Two circles touch each other externally. The sum of their areas is 5811 cm2 and the distance between their centres is 10 cm. Find the radii of the two circles.
Find the volume and the surface area of the spheres in the following :
Radius= 2.1 cm
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.
The area between the circumference of two concentric circles is 2464cm2. If the inner circle has a circumference of 132cm, calculate the radius of the outer circle.
