SOLUTION: Two trains leave a train station at the same time. One travels east at 9 miles per hour. The other train travels west at 8 miles per hour. In how many hours will the two trains be
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Question 835712: Two trains leave a train station at the same time. One travels east at 9 miles per hour. The other train travels west at 8 miles per hour. In how many hours will the two trains be 28.9 miles apart?
Found 2 solutions by richwmiller, josmiceli:
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
9x+8x=28.9
17x=28.9
x=1.7
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
You can think of one of the trains as
standing still and the other train
moving at the sum of their speeds
-------------------------------
Let = the number of hours
until they are miles apart
-------------------------------
In 1.7 hrs they will be 28.9 mi apart
---------------------------------
check answer:
Faster train:
mi
--------------------
---------------
mi
OK
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