document.write( "Question 382546: i sailed west to hawaii againts the wind at a speed of 12 knots/hour. when i returned, i sailed the same route with the wind at a speed of 18 knots/hour. what was my average speed for the entire trip? \n" ); document.write( "
Algebra.Com's Answer #271065 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
the distance isn't given because it has no bearing on the answer\r
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\n" ); document.write( "\n" ); document.write( "that means we can choose a convenient \"working\" distance , like 36 nautical miles\r
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\n" ); document.write( "\n" ); document.write( "time to H ___ 36/12 = 3\r
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\n" ); document.write( "\n" ); document.write( "return time ___ 36/18 = 2\r
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\n" ); document.write( "\n" ); document.write( "total time is 5 hr and total distance is 72 nautical miles\r
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\n" ); document.write( "\n" ); document.write( "average speed is 72/5 or 14.4 knots/hr
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