Question

The radius and slant height of a cone are in the ratio 4:7. If its curved surface area is 792 cm2 find its radius.

Answer 1

let the ratio be x .
then ,r= 4x and l= 7x .
curved surface area = 792 cm²
Πrl = 792
22/7×4x×7x = 792
22×4x²= 792
88x²= 792
x²= 9
x= 3
hence ,radius = 3×4
= 12 cm

Answer 2

$\huge\bold{Answer》}$

refer above attachment