document.write( "Question 948088: a passenger jet took 6h to fly 3600km in the direction of the jet stream. the return trip against the jet stream took 8h. determine the speed in still air and the speed of the jet stream. \n" ); document.write( "
Algebra.Com's Answer #578684 by lwsshak3(11628)\"\" \"About 
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a passenger jet took 6h to fly 3600km in the direction of the jet stream. the return trip against the jet stream took 8h. determine the speed in still air and the speed of the jet stream.
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\n" ); document.write( "let x=speed of jet plane in still air
\n" ); document.write( "let c=speed of jet stream
\n" ); document.write( "x+c=speed of jet plane in the direction of the jet stream.
\n" ); document.write( "x-c=speed of jet plane against the jet stream
\n" ); document.write( "travel time*speed=distance
\n" ); document.write( "..
\n" ); document.write( "6(x+c)=3600
\n" ); document.write( "8(x-c)=3600
\n" ); document.write( "..
\n" ); document.write( "6x+6c=3600
\n" ); document.write( "8x-8c=3600
\n" ); document.write( "..
\n" ); document.write( "24x+24c=14400 (mult. eq. by 4)
\n" ); document.write( "24x-24c=10800 (mult. eq. by 3)
\n" ); document.write( "add
\n" ); document.write( "48x=25200
\n" ); document.write( "x=525
\n" ); document.write( "..
\n" ); document.write( "subtract:
\n" ); document.write( "48c=3600
\n" ); document.write( "c=75
\n" ); document.write( "speed of jet plane in still air=525 km/hr
\n" ); document.write( "speed of jet stream=75 km/hr\r
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