SOLUTION: Two planes just took off from Boston the first plane is traveling 3.5 times as fast as the second plane after traveling in the same direction for five hours they are 1312.5 miles a

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Question 1009037: Two planes just took off from Boston the first plane is traveling 3.5 times as fast as the second plane after traveling in the same direction for five hours they are 1312.5 miles apart what is the average speed of each plane
Answer by josgarithmetic(39615) About Me  (Show Source):
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Two planes just took off from Boston.

The first plane is traveling 3.5 times as fast as the second plane.

After traveling in the same direction for five hours, they are 1312.5 miles apart.

What is the average speed of each plane? 

                       rate      time      distance
first plane            3.5r        5         (   )
second plane           r           5         (   )
Difference                                   1312.5