An airplane has a speed of 135 mi/h in still air. It is flying straight north so that it is always directly above a north-south highway. A ground observer tells the pilot by radio that a 70 mi/h wind is blowing, but neglects to give the wind direction. The pilot observes that despite the wind, the plane can travel 135 miles along the highway in an hour. What is the direction of the wind
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An airplane has a speed of 135 mi/h in still air. It is flying straight north so that it is always d...
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