JEE Main 2022 · 28 Jul · Shift 2, Mathematics question 85

Two tangent lines $l_1$ and $l_2$ are drawn from the point (2, 0) to the parabola $2y^2=-x$. If the lines $l_1$ and $l_2$ are also tangent to the circle $(x-5)^2+y^2=r$, then 17r is equal to ______.