SOLUTION: An airplane leaves an airport traveling north at 10 AM and at 2 PM another plane leaves the same airport traveling south. If the plane traveling north travels 20 miles per hour fas

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Question 891199: An airplane leaves an airport traveling north at 10 AM and at 2 PM another plane leaves the same airport traveling south. If the plane traveling north travels 20 miles per hour faster than the plane flying south, what is the distance traveled by the faster plane, if at 7 PM they are 2,700 miles apart?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
10AM to 2PM is 4 hours.
2PM to 7PM is 5 hours.
10AM to 10PM is 9 hours.

The northbound plane traveled (r+20)*9 miles and the southbound plane traveled r*5 miles.

Both planes going opposite directions, away from each other;
highlight%28%28r%2B20%29%2A9%2Br%2A5=2700%29;
Solve for r.
From r, you can compute the distance traveled for each plane.