Directions: The following caselet shows the speed of three boats while traveling between two ports X and Y

Three boats A, B, and C traveling between ports X and Y which are 60 km apart. The ratio of the speed of the boats A and B in still water is 2 : 3. The ratio of speed of the boat A while traveling upstream to the speed of boat C while traveling downstream is 1 : 5. The speed of boat B while traveling downstream is twice of its speed while traveling upstream. The speed of the stream is 5 km/hr. While traveling port X to port Y the boats travel against the stream, and while traveling from port Y to port X they travel along with the stream.