SOLUTION: a car leaves a train station traveling west at a speed of 40 kilometers per hour. a train leaves the station three hours later traveling west at a rate of 120 kilometers per hour.

Question 255567: a car leaves a train station traveling west at a speed of 40 kilometers per hour. a train leaves the station three hours later traveling west at a rate of 120 kilometers per hour. in how many hours will the train catch up to the car?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
d=rt
Because the distances are the same we have:
40t=120(t-3)
40t=120t-360
40t-120t=-360
-80t=360
t=-360/-80
t=4.5 hours after the car leaves the station they will meet.
Proof:
40*4.5=120(4.5-3)
180=120*1.5
180=180
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