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An airplane is traveling at 390 km/hr in still air encounters a 65 km/hr headwind. how long will it take the plane to travel 725 km into the wind?

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sirwill007
The aircraft normally travels 390 kph, but with a head wind of 65 kph it would travel only 325 kph. 

725 km / 325 kph = 2.23 hours or about 2 hours and 14 mins. 

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