document.write( "Question 890887: An aircraft flies downwind from A to B with speed of 400mph for 2 hours and returns in absence of wind in 2.5 hours. What is the wind speed?
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Algebra.Com's Answer #773072 by Alan3354(69443)\"\" \"About 
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An aircraft flies downwind from A to B with speed of 400mph
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\n" ); document.write( "Is that its airspeed or groundspeed?
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\n" ); document.write( "A \"trick question.\"
\n" ); document.write( "Airspeed does not vary with windspeed, so groundspeed must be assumed.\r
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