document.write( "Question 668357: An airplane flies 900 miles against a headwind of 25 miles per hour. The plane took 15 minutes longer for this flight with a tailwind of 25 miles per hour. How fast could the plane fly in still air? \n" ); document.write( "
Algebra.Com's Answer #415482 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi,Previously Posted
\n" ); document.write( "Note: t = D/r
\n" ); document.write( "\"+900%2F%28v-25mph%29-900%2F%28v%2B25mph%29+=+1%2F4\"
\n" ); document.write( " 3600(v+25) - 3600(v-25) = v^2 - 625
\n" ); document.write( " 7200*25 +625 = v^2
\n" ); document.write( " 425mph = v
\n" ); document.write( "and..
\n" ); document.write( "\"2%261%2F4+-+2+=+1%2F4\" \n" ); document.write( "
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