Two objects are moving on a circular path of length 160 km at a speed of 30 kmph and 50 kmph in the opposite direction. At how many point will both the objects meet on a circular path if they are continuously moving?

A and B can do a piece of work in 36 days. B and C can do the same work in 60 days. A and C can do the same work in 45 days. In how many days can A alone complete the same work?