Question 1024950
A plane flying at its maximum speed can go 200 miles per hour with a tailwind or 160 miles per hour into a headwind. 
Those are groundspeeds, upwind and downwind.
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What would be the maximum speed of the plane if there were no wind?
It's the average of the 2 groundspeeds.
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What is the wind speed?
It's difference between the airspeed and groundspeed.