document.write( "Question 814315: Wind Speed. Joe traveled against the wind in a small plane for 3 hours. The return trip with wind took 2.8 hours. Find the speed of the wind if the speed of the plane in still air is 180 mph. \n" ); document.write( "

Algebra.Com's Answer #490215 by TimothyLamb(4379) $\"\"$ $\"About$

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p = 180
\n" ); document.write( "---
\n" ); document.write( "s = d / t
\n" ); document.write( "d = s * t
\n" ); document.write( "---
\n" ); document.write( "d = (p - w) * 3
\n" ); document.write( "d = (p + w) * 2.8
\n" ); document.write( "---
\n" ); document.write( "3(p - w) = 2.8(p + w)
\n" ); document.write( "3(180 - w) = 2.8(180 + w)
\n" ); document.write( "540 - 3w = 504 + 2.8w
\n" ); document.write( "36 = 5.8w
\n" ); document.write( "w = 6.2068966
\n" ); document.write( "---
\n" ); document.write( "Answer:
\n" ); document.write( "w = 6.2 mph
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