The radii of two

Given : Ratio of radii of two cylinders = r₁ : r₂ = 3 : 2

Ratio of heights of the two cylinders = h₁ : h₂ = 5 : 3

To find : Ratio of CSA of the two cylinders = C₁ : C₂ = ?

Formula : CSA of cylinder = 2rh

Solution : CSA of first cylinder = C₁ = 2r₁h₁

CSA of first cylinder = C₂ = 2r₂h₂

∴

⇒

∴ C₁ : C₂ = 5 : 2

∴ The ratio of the curved surface areas of the two cylinders is 5 : 2.