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When the wind speed is 22km / h, it takes 2 hours and 30 minutes to fly with the wind and 3 hours to fly against the wind. The distance between the two cities is calculated
The distance between the two cities is x km
x／2.5－22=x／3＋22
x=660
The distance between the two cities is 660 kilometers
A plane flies between two cities. When there is no wind, it flies 552 kilometers per hour. In a round-trip flight, it takes 5.5 hours to fly with the wind and 6 hours to fly against the wind. The speed of the wind in this flight is calculated
Let the speed of the wind be x km / h. according to the meaning of the question, we get: (552-x) × 6 = (552 + x) × 5.5, and the solution is x = 24. A: the speed of the wind is 24 km / h
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