Two balls, A and B, are launched simultaneously from the origin (O) on a level surface at the respective angles of 60° and 30° shown in the picture. Ball A has a launch speed v while Ball B has a launch speed 2v. Ball A lands T seconds after launch at a horizontal distance D from the origin.
[Figure: Shows two projectile paths with Ball A at 60° angle and Ball B at 30° angle]
What horizontal distance separates the landing points of Ball A and Ball B?
A) 2D B) 3D C) 4D D) 5D E) 6D