Maths problem helppppppppppppppp

FIND RADIUS OF A CONE ITS RADIUS AND SLANT HEIGHT ARE IN DA RATIO OF 7:3
AND ITS CURVED SURFACE AREA IZ 286cmsq.(use pie +22/7)

Let the radius be 7x cm

Slant height = 3x

Curved surface area = pi r l = pi * 7x *3x = 286

21x^2 = 286 / 22/7 = 91

x^2 = 91/21 = 4.333

x = 2.08

Radius = 7x = 14.57 cm ANSWER

Let the radius be 7x
and slant height be 3x..
Then,
C.S.A. = π r l
=> 286 = π * 7x * 3x
=> x² ≈ 4.335
=> x ≈ 2.082

Thus, radius = 14.574 cm