A sphere,cylinder,and cone are of the same radius and same height. Find the ratio of their curved surface area. please answer it
Since, the height of a sphere is the diameter, the cone and cylinder have height 2r.
Then
Curved surface area of Sphere=4πr²
Curved surface area of cylinder = 2πr(2r)=4πr²
Curved surface area of cone = πrl
where,
⇒Curved surface area of cone =
Now,