Given below is a triangle one of the acute angles is $60^{\circ}$. The base of the triangle is given as 15 cm. What is its height ?

Question

$\begin{array}{1 1} (a)\; 15\;cm \\ (b)\; \large\frac{15}{\sqrt{3}} \\ (c)\; 15 \sqrt{3}\;cm \\ (d)\; 30\;cm \end{array}$