document.write( "Question 384004: If a plane can travel 490 miles per hour with the wind and 410 miles per hour against the wind, find the speed of the plane in still air.
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Algebra.Com's Answer #271810 by mananth(16946)\"\" \"About 
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What is the speed of the plane in still air? _____ mph
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\n" ); document.write( "900/2 = 450 mph
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