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 1.8 hours. What is the plane's speed in still air, and how fast is the wind blowing? His plane speed is mph

The wind speed is mph