document.write( "Question 450154: A plane travels a distance of 1000 km in 2.5 hours while flying against the wind and in 2 hours while flying with the wind. find the speed of the wind and the speed of the plane in still air. \n" ); document.write( "
Algebra.Com's Answer #310257 by rwm(914)\"\" \"About 
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rate times time =distance
\n" ); document.write( "r*t=d
\n" ); document.write( "(s-w)*2.5=1000
\n" ); document.write( "(s+w)*2=1000
\n" ); document.write( "s=450 kph in still air
\n" ); document.write( " w=50 kph wind
\n" ); document.write( "check
\n" ); document.write( "400*2.5=1000
\n" ); document.write( "500*2=1000\r
\n" ); document.write( "\n" ); document.write( "ok\r
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