Two objects are moving on a circular path of length 600 m at a speed of 20 m/sec and 50 m/sec in the same direction. At how many point will both the objects meet on a circular path if they are continuously moving?
A certain number of persons can complete a work in 54 days. If there were 15 persons less, it would take 18 days more for the work to be completed. Initially, the number persons is: