document.write( "Question 948147: When a plane flies into the wind , it can travel 3000km in 6 hours. When it flies with the wind, it can travel the same distance in 5 hours. Find the rate of the plane in still air and the rate of the wind. \r
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Algebra.Com's Answer #578685 by MathTherapy(10553) $\"\"$ $\"About$

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\n" ); document.write( "When a plane flies into the wind , it can travel 3000km in 6 hours. When it flies with the wind, it can travel the same distance in 5 hours. Find the rate of the plane in still air and the rate of the wind. \r
\n" ); document.write( "\n" ); document.write( "I sorta know how to do these problems. I am just a little confused on this one. Could you help me with this one please?
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document.write( "Let speed of plane in still air, be S, and speed of wind, W
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document.write( "Average speed when flying against wind: , or 500 km
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document.write( "Average speed when flying with wind: , or 600 km
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document.write( "Speed of plane in still air, less wind’s speed, equals average speed against wind, OR
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document.write( "S – W = 500 -------- eq (i)
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document.write( "Speed of plane in still air, plus wind’s speed, equals average speed with wind, OR
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document.write( "S + W = 600 -------- eq (ii)
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document.write( "2S = 1,100 -------- Adding eqs (ii) & (i)
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document.write( "S, or speed of plane in still air = , or  km/h
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document.write( "550 – W = 500 -------- Substituting 550 for S in eq (i) 
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document.write( "- W = 500 – 550 
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document.write( "- W = - 50
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document.write( "W, or speed of wind = , or  km/h \n" );
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