Let a point A lie between the parallel lines $\mathrm{L}_{1}$ and $\mathrm{L}_{2}$ such that its distances from $\mathrm{L}_{1}$ and $\mathrm{L}_{2}$ are 6 and 3 units, respectively. Then the area (in sq. units) of the equilateral triangle ABC , where the points B and C lie on the lines $\mathrm{L}_{1}$ and $\mathrm{L}_{2}$ respectively, is :