Relative Speed Questions

A policeman notices a thief from a distance of 300m. The thief starts running and the policeman chases him. The thief and the policeman run at speeds of 10km/h and 12km/h, respectively. What will be the distance between them (in m) after 6 minutes?

A train leaves Hyderabad at 4:00 A.M. and reaches Vijayawada at 8:00 A.M. the same day. Another train leaves Vijayawada at 6:00 A.M. and reaches Hyderabad at 9:30 A.M the same day. At what time do the two trains cross each other?

In a circular race of $2,500\text{ m}$, Reeta and Geeta start running in the same direction from the same point and at the same time with speeds of $36\text{ km/h}$ and $54\text{ km/h}$, respectively. After how much time will they meet for the first time on the track?