Posted by Shaniqua on Wednesday, December 5, 2012 at 12:31pm.
Two trains leave a train station at the same time. One travels east at 11 miles per hour. The other train travels west at 9 miles per hour. In how many hours will the two trains be 70 miles apart?

Math  PsyDAG, Wednesday, December 5, 2012 at 1:35pm
11h + 9h = 70
Solve for h.