A right angled sector of radius r cm is ...

A right angled sector of radius r cm is rolled up into a cone in such a way that the two binding radii are joined together. Then the curved surface area of the cone is____

`Pir^2 cm^2`

`4Pir^2 cm^2`

`(Pir^2)/(4) cm^2`

`2Pir^2 cm^2`

Text Solution

Verified by Experts

Topper's Solved these Questions

Rectangular Parallelopiped Cuboid
UNITED BOOK HOUSE|Exercise Exercise |26 Videos
Right Circular Cylinder
UNITED BOOK HOUSE|Exercise Exercise |26 Videos

Similar Questions

Explore conceptually related problems

The diameter of the base of a right circular cone is 6 cm and height is 4 cm . Then the curved surface area of the cone is

The radius of a right circular cone is 7 cm at its vertical angle is 60^@ . Find the curved surface area of the cone.

A right circular cone is made by melting a piece of metal right cylinder of radius 8 cm and height 2 cm . If the height of the cone is 3 times the height of the cylinder , then what will be the curved surface area of the cone ?

The volume of a right circular cone is 1232 c c . If the diameter of the base cone be 28 cm , then what will be the curved surface area of the cone ?

The volume of a sphere and a right circular cone are same. The height of the cone is twice the length of the radius of the cone. Find the ratio of the curved surface area of the cone and sphere.

If the whole surface area of a right circular cone be 3696 sq-cm and the ratio of its radius of base and height be 3:4 , then what will be the curved surface area of the cone ?

Two cubes each of volume 64 cm^3 are joined end to end together. Find the surface area of the resulting cuboid.

The ratio of the radius of base and height of a right circular cone is 4:3 , if the area of the base of the cone be 154 sq-cm, then what will be the curved surface area of the cone ?

The volume of a right circular cone is 410(2)/(3)c c . If the radius of the base of the cone be 14 cm , then what will be the curved surface area of the cone ?

If the vertical angle of aright circular cone be 60^@ and its diameter of base be 14 cm , then what will be the curved surface area of the cone ?

UNITED BOOK HOUSE-Right Circular Cone-Exercise

The slant height and whole surface of a right circular cone are 7 cm a...
Text Solution
|
If the radii of the circular ends of a bucket of height 40 cm are of l...
Text Solution
|
A solid sphere of radius r is melted and cast into the shape of a soli...
Text Solution
|
A metallic hemisphere is melted and recast in the shape of a cone with...
Text Solution
|
Volume of two cones are in the ratio 1 : 4 and their diameter in the r...
Text Solution
|
If a right circular cone is separated into solids of volumes V1, V2, V...
Text Solution
|
The height of the cone is 30 cm. A small cone is cut off at the top by...
Text Solution
|
If the area of the base of a cone is 770 cm^2 and the area of the curv...
Text Solution
|
The radius of the base and height of a right circular cone are in the ...
Text Solution
|
Two solid right cones of equal height and of radii r1 and r2 are melte...
Text Solution
|
The radius of the base of a right circular cone is doubled keeping its...
Text Solution
|
The base of a right circular cone has the same radius a as that of a s...
Text Solution
|
The circumference of the base of a 16 cm height solid cone is 33 cm. W...
Text Solution
|
The volume of a conical tent is 1232 cu. M and the area of its base is...
Text Solution
|
If S denotes the area of the curved surface of a right circular cone o...
Text Solution
|
The height and the radius of the base of a right circular cone are 12 ...
Text Solution
|
A right angled sector of radius r cm is rolled up into a cone in such ...
Text Solution
|
The radius of base and slant height of a cone are in the ratio 4 : 7. ...
Text Solution
|
If h, c, v are respectively the height, curved surface area and volume...
Text Solution
|
The radius of the base of a conical tent is 16 metres. If 427 3/7 sq. ...
Text Solution
|