A person walking along a straight road towards a hill observes at two points with distance $$\sqrt{3}$$ km. between them the angles of elevation of the hill to be $$30^\circ$$ and $$60^\circ$$. What is the height of the hill?

A

$$\frac{\sqrt{3}}{2}$$ km

B

$$\frac{1}{2}$$ km

C

1 km

D

$$\frac{3}{2}$$ km