Asked by Kate

A train left Podunk and traveled west at 70 km/h. Two hours later, another train left Podunk and traveled east at 90 km/h. How many hours had the first train traveled when they were 1420 km apart?

How do you solved this?
Answered by Reiny
I translated your English into Math and got
70t+140 + 90t = 1420

Take it from there.
Answered by Kate
where did you get 140 from?
Answered by Reiny
didn't the first train go for 2 hrs at 70 km/h ? How far did it go in that time ?
Answered by Kate
Got it. Thank you very much
Answered by Reiny
Welcome!
Answered by Kate
a train left podunk and traveled north at 75 km/h. two hours later, another train left podunk and travled in the same direction at 100 km/h. how many hours had the first train traveled when the second train overtook it?

can someone help set this up?
Answered by aly
8 hrs.....
Answered by katie
aly, its not 8 hrs......
Answered by Brando
You would set them up equal to each other.
Looks like.
75T + 150 = 100T
T= 6
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