A Bomb Explodes into Three Pieces of Mass M,2m,and 3m

Multiple Choice

A bomb explodes into three pieces of mass m,2m,and 3m.The mass m piece flies into the + x direction.The 2m piece flies in the + y direction.If all pieces fly off with the same velocity,what is the angle of the third piece with respect to the + x axis?

A) 180.0 degrees
B) 243.4 degrees
C) 124.3 degrees
D) 84.5 degrees
E) More information is needed.