The diameters of two cones are equal. If their slant heights are in the ratio 5:4, find the ratio of theri curved surfaces.

Explanation

let slant height of 1st cone`=5x`

and slant height of 2nd cone`=4x`

given `r=R`

so ratio of their curved surface area`={pir(5x)}/{pixxRxx(4x)}`

(since `r=R`)

`=5/4`