When an object is shot from the bottom of a long smooth inclined plane kept at an angle $$60^\circ$$ with horizontal, it can travel a distance $$x_1$$ along the plane. But when the inclination is decreased to $$30^\circ$$ and the same object is shot with the same velocity, it can travel $$x_2$$ distance. Then x_1 : x_2 $$ will be:

A

$$\sqrt 2 : 1$$

B

$$1 : \sqrt 3$$

C

$$1 : 2\sqrt 3$$

D

$$1 : \sqrt 2$$