Anju and Anjana are running in the same direction on a 240 m long circular track at speeds of 24 m/min and 40 m/min respectively. When will they meet at the starting point for the first time?

P takes 6 hours more than Q to walk 'm' km. If P doubles his speed, then he can make it in 2 hours less than Q. How much time (in hours) does P require to walk 'm' km?

A policeman spots a thief from a distance of 105 metres. The thief and the policeman travel at speeds of 90 km/h and 100 km/h respectively. How long will it take the policeman to catch the thief?