Answer:
Passenger train 60 km/h.
Freight train 30 km/h.
Step-by-step explanation:
Let the rate of the freight train be x km / hr the passenger train's rate is 2x km/hr.
The combined speed = 3x km/hr, so we have the equation
speed = distance . / time
3x = 270 / 3
9x = 270
x = 30 km/h.