Question 812668
Time freight train - time passenger train = 1.5

let distance =x
time freight train = x/40
time passenger train = x/60

x/40-x/60 =1.5
multiply by the LCD 120

3x-2x=1.5*120

x=180 miles distance

time taken = 180/60 = 3hours passenger train
180/40 =4.5 hours - freight train