10. Given an equilateral triangle $ABC$ with area $S$. Three lines are drawn parallel to its sides at an equal distance from them, intersecting inside the triangle and forming a triangle $A_{1} B_{1} C_{1}$ with area $Q$. Find the distance between the parallel sides of triangles $ABC$ and $A_{1} B_{1} C_{1}$.
10. If $Q \geqslant \frac{1}{4} S$, then the desired distance will be $\frac{\sqrt[1]{3}}{3} \times$ $\times(\sqrt{S}-\sqrt{Q})$. If $Q<\frac{1}{4} S$, then there are two possible answers: $\frac{\sqrt[4]{3}}{3}(\sqrt{S} \pm \sqrt{Q})$