Question 673048
let distance be x
passenger train speed = 60 mi/h
time pasanger train = x/60

Similarly time freight train = x/40

Difference between the two timings is 1.5

x/40 -x/60 = 1.5

LCD = 120
3x-2x=120*1.5
x= 180 miles

Passenger train takes 180/60 = 3 hours
 Freight tain takes 180/40 = 4.5 hours