A thief is spotted by a policeman from a distance of 100 m. When the policeman starts the chase, the thief also starts running. If the speed of thief be 4 kmh"1 and that of the policeman 10 kmh1 , how far will the thief have to run before he is caught ?
Two stations A and B are 200 km apart on a straight line. A train starts from 'A' towards ' B ' at the rate of 10 kmh" 5 hours later another train starts from ' B ' and travels towards 'A' at the rate of 5 kmh1 . When will the first train meet the second train ?