document.write( "Question 883307: I am having some difficulty with this problem below and I could use assistance!\r
\n" ); document.write( "\n" ); document.write( "Flying against the wind, an airplane travels 6120 km in 9 hours. Flying with the wind, the same plane travels 2940 km in 3 hours. What is the rate of the plane in still air and what is the rate of the wind? \n" ); document.write( "
Algebra.Com's Answer #533438 by stanbon(75887)\"\" \"About 
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Flying against the wind, an airplane travels 6120 km in 9 hours. Flying with the wind, the same plane travels 2940 km in 3 hours. What is the rate of the plane in still air and what is the rate of the wind?
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\n" ); document.write( "rate against the wind = 6120/9 = 680 km/h
\n" ); document.write( "rate with the wind = 2940/3 = 980 km/h
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\n" ); document.write( "Equations:
\n" ); document.write( "p + w = 980
\n" ); document.write( "p - w = 680
\n" ); document.write( "----
\n" ); document.write( "Add and solve for plane speed:
\n" ); document.write( "2p = 1660
\n" ); document.write( "p = 830 km/h (plane speed in still air)
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\n" ); document.write( "Solve for \"w\":
\n" ); document.write( "2w = 300
\n" ); document.write( "w = 150 km/h (speed of the wind)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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