SOLUTION: Two planes leave an airport at noon, one flying east at a certain speed and the other flying west at twice that speed. If the planes are 2700 miles apart in 3 hours, what is the sp

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Question 100114: Two planes leave an airport at noon, one flying east at a certain speed and the other flying west at twice that speed. If the planes are 2700 miles apart in 3 hours, what is the speed of each plane?
I tried the equation 3(2r)+3r=2700 but it didn't seem to work out very well for me.Please help me.
Thank you =]
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
why do you say it didn't work out?

6r+3r=2700 ... 9r=2700 ... r=300 ... 2r=600