document.write( "Question 940058: A small plane flying into the wind takes 3 hours 20 minutes to complete flight of 960 km, flying with the wind, the same plane takes 2 hours and 30 minutes to make the same trip. Shag is the speed of the plane? What is the speed of the wind?
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Algebra.Com's Answer #572868 by lwsshak3(11628)\"\" \"About 
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A small plane flying into the wind takes 3 hours 20 minutes to complete flight of 960 km, flying with the wind, the same plane takes 2 hours and 30 minutes to make the same trip. Shag is the speed of the plane? What is the speed of the wind?
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\n" ); document.write( "let x=speed of plane with no wind
\n" ); document.write( "let c=speed of wind
\n" ); document.write( "x+c=speed of plane with wind
\n" ); document.write( "x-c=speed of plane against wind
\n" ); document.write( "travel time*speed=distance
\n" ); document.write( "..
\n" ); document.write( "3 hrs 20 min=3 1/3 hr=10/3 hr
\n" ); document.write( "2 hrs 30 min=2 1/2 hr=5/2 hr
\n" ); document.write( "..
\n" ); document.write( "10/3*(x-c)=960
\n" ); document.write( "5/2*(x+c)=960
\n" ); document.write( "..
\n" ); document.write( "10x-10c=2880
\n" ); document.write( "5x+5c=1920
\n" ); document.write( "..
\n" ); document.write( "10x-10c=2880
\n" ); document.write( "10x+10c=3840
\n" ); document.write( "add:
\n" ); document.write( "20x=6720
\n" ); document.write( "x=336
\n" ); document.write( "subtract:
\n" ); document.write( "-20c=-960
\n" ); document.write( "c=48
\n" ); document.write( "speed of plane with no wind=336 km/hr
\n" ); document.write( "speed of wind=48 km/hr \n" ); document.write( "
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