SOLUTION: At 10:00 a.m. planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320mph, at what time will they be 1,000 miles apart?

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Question 88697: At 10:00 a.m. planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320mph, at what time will they be 1,000 miles apart?
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
280T+320T=1000
600T=1000
T=1000/600
T=1 2/3 HOURS THEY WILL BE 1000 MILES APART OR @ 11:40 AM.