Posted by **AJ** on Tuesday, August 31, 2010 at 7:22pm.

two trains leave a train station at the same time. One travels east at 10 miles per hour, the other travels west at 9 miles per hour. In how many hours will the two trains be 45.6 miles apart?

- College Algebra -
**jai**, Tuesday, August 31, 2010 at 9:26pm
let x = time it takes for them to be 45.6 miles apart (in hours)

recall: (speed)*(time)=distance

>>since they travel in opposite directions, the distances between the station to their present location will be added.

10x + 9x = 45.6

19x = 45.6

x = 2.4 hours

so there,, =)

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