A train covers a certain distance. Had it moved 4 kmh"1 faster, it would have taken 1.5 hrs less. If it had moved 6 kmh'1 slower, it would…

A train covers a certain distance. Had it moved 4 kmh"1 faster, it would have taken 1.5 hrs less. If it had moved 6 kmh'1 slower, it would have taken 3 hrs more. What is the distance the train covers