The hypotenuse of a triangle as shown in the figure is 25 units . What is its area ?

Question

$\begin{array}{1 1} (a)\;\large\frac{625 \sqrt 3}{8} \\ (b)\;\large\frac{625 \sqrt 3}{4} \\ (c)\;\large\frac{625 \sqrt 3}{2} \\ (d)\;625 \sqrt 3 \end{array}$