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Flying against the jetstream, a jet travels 4,240 km in 8 hours. Flying with the jetstream, the plane travels 2,910 km in 3 hours. What is the speed of the jet in still air, and what is the speed of the jetstream?
A boat travels 45 miles upstream (against the current) in 5 hours. The boat travels the same distance downstream in 3 hours. What is the rate of the boat in still water? What is the rate of the current?
A jet leaves an airport traveling a steady pace of 600km/hour. Another jet leaves the same airport 3/4 hours later traveling 800km/hour. How long will it take the second jet to overtake the first?
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