a passanger train's speed is 60 mi/h,
a passanger train's speed is 60 mi/h, and a freight train's speed is 40 mi/h. The passenger train travels the same distance 1.5 h less time than the freight train. How long does each train take to make the trip
d = s * t
Passenger train: d = 60 * (t - 1.5)
Freight train: d = 40 * t
40t = 60(t - 1.5)
40t = 60t - 90
40t - 60t = - 90
-20t = -90
t = -90 / -20
t = 4.5 hrs
The freight train travels 4.5 hrs
The passenger train travels 4 hrs
Passenger train: d = 60 * (t - 1.5)
d = 60 * 3 = 180
Freight train: d = 40 * t
d = 40 * 4.5 = 180