document.write( "Question 393309: If a plane can travel 510 miles per hour with the wind and 410 miles per hour against the when, find the speed of the plane in still air. \n" ); document.write( "

Algebra.Com's Answer #279152 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
It's the average, (510 + 410)/2 = 460 mi/hr, and it's called airspeed, not \"the speed in still air.\"
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