From a point P on a level ground, the angle of elevation of the top of the tower is $$30^{\circ}$$. If the distance of point P from the foot of the tower is 510 m, then 50% of the height of the tower (in m) is:

A

85

B

$$85\sqrt{3}$$

C

$$\frac{85\sqrt{3}}{3}$$

D

$$150\sqrt{3}$$