SOLUTION: two hours after a freight train leaves the station a passenger train leaves the same station traveling in the same direction at a average speed of 60km per hr. after travelling 4 h

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Question 1102405: two hours after a freight train leaves the station a passenger train leaves the same station traveling in the same direction at a average speed of 60km per hr. after travelling 4 hrs the passenger train overtakes the freight train. what was the average speed of the freight train?
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
              SPEED        TIME      DISTANCE

FREIGHT          r          4+2       d

PASSENGER        60         4         d

Both trains reached same distance d when passenger train caught up.
r%2A6=60%2A4
r=10%2A4
highlight%28r=40%29---------speed of freight train.