document.write( "Question 974123: A plane can travel 470mph with the wind and 390mph against the wind. What is the speed of the plane if the air is still? \n" ); document.write( "
Algebra.Com's Answer #596149 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! It's the average of the 2 groundspeeds, and it's called airspeed. \n" ); document.write( " \n" ); document.write( " |