document.write( "Question 465700: George drove to town at 50 mph and rove back home at 40 mph. What is the distance to town if the whole trip took 9 hours? \n" ); document.write( "
Algebra.Com's Answer #319113 by Alan3354(69443)\"\" \"About 
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Another approach:
\n" ); document.write( "The average speed for a round trip is similar to parallel resistors, but times 2.
\n" ); document.write( "Avg speed = 2*40*50/(40+50) = 4000/90 mph
\n" ); document.write( "r = 400/9 mph
\n" ); document.write( "t = 9 hours
\n" ); document.write( "d = (400/9)*9 = 400 miles round trip
\n" ); document.write( "--> 200 miles one way
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