Posted by Kate on Thursday, December 3, 2009 at 11:10pm.
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?

math  Reiny, Thursday, December 3, 2009 at 11:20pm
I translated your English into Math and got
70t+140 + 90t = 1420
Take it from there.

math  Kate, Thursday, December 3, 2009 at 11:23pm
where did you get 140 from?

math  Reiny, Thursday, December 3, 2009 at 11:24pm
didn't the first train go for 2 hrs at 70 km/h ? How far did it go in that time ?

math  Kate, Thursday, December 3, 2009 at 11:27pm
Got it. Thank you very much

math  Reiny, Thursday, December 3, 2009 at 11:29pm
Welcome!

math  Kate, Friday, December 4, 2009 at 12:09am
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?

math  aly, Saturday, October 16, 2010 at 3:42pm
8 hrs.....

math  katie, Sunday, May 1, 2011 at 8:17pm
aly, its not 8 hrs......

math  Brando, Tuesday, June 21, 2011 at 8:46pm
You would set them up equal to each other.
Looks like.
75T + 150 = 100T
T= 6
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