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)![]() ![]() You can put this solution on YOUR website! 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 \n" ); document.write( " \n" ); document.write( " |