SOLUTION: two jets leave chicago at 8 a.m, one traveling north at 650 km/h and the other south at 750km/h. At what time will they be 3500 km apart?

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Question 181900: two jets leave chicago at 8 a.m, one traveling north at 650 km/h and the other south at 750km/h. At what time will they be 3500 km apart?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Their speed relative to each other is the sum, 650 + 750 = 1400.
3500/1400 = 2.5 hours.