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,

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