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A man flies a small airplane from Fargo to Bismarck, North Dakota

A man flies a small airplane from Fargo to Bismarck, North Dakota --- a distance of 180 miles. Because he is flying into a head wind, the trip takes him 2 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes only 1 hour and 30 minutes. What is the plane's speed in still air, and how fast is the wind blowing?

his plane speed equals mph.
the wind speed equals mph.

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Luke B. | fun + learning = inevitable progressfun + learning = inevitable progress
4.9 4.9 (90 lesson ratings) (90)
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180 miles / 120 minutes = 90 mph

180 miles / 90 minutes = 120 mph

average velocity = 105 mph

wind speed = 15 mph