A tree breaks down in a storm and stands in the front as shown in the figure. What is the height of the tree if its tip is 10 m from the bottom?

Question

$\begin{array}{1 1} (a)\;\large\frac{20}{\sqrt 3}+10 \\ (b)\;\large\frac{\sqrt3}{20}+10 \\ (c)\;\large\frac{10}{\sqrt 3}+10 \\ (d)\;\large\frac{10}{\sqrt 3}-10 \end{array}$