The radius and slant height of a cone are in the ratio of 4:7. If its curved surface area is `792 c m^2,` find its radius. `(U s epi=(22)/7)`

Explanation

let radius `r=4x`

`l=7x`

according to question ,

`pirl=792`

`pixx(4x)xx(7x)=792`

so `x=3`

so `r=4xx3=12cm`