SOLUTION: A plane leaves an airport flying north at 800km/h. At the same time another plane leaves the same airport and flies south at 750km/h. In how many hours will they be 4650 km apart?

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Question 1044372: A plane leaves an airport flying north at 800km/h. At the same time another plane leaves the same airport and flies south at 750km/h. In how many hours will they be 4650 km apart?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The planes are flying apart at 800+750 =1550 km an hour (their combined speed)
4650 km /1550 km/hr=3 hours.