document.write( "Question 1197136: Joseph traveled from Boston to Birmingham at 50 mph and then back to Boston at 40 mph. What was Joseph's average speed on the round trip? \n" ); document.write( "
Algebra.Com's Answer #830262 by ikleyn(52864)\"\" \"About 
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\n" ); document.write( "Joseph traveled from Boston to Birmingham at 50 mph and then back to Boston at 40 mph.
\n" ); document.write( "What was Joseph's average speed on the round trip?
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document.write( "For the average speed of the round trip (when the distances of both parts of the trip \r\n" );
document.write( "are the same) use the formula\r\n" );
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document.write( "    average speed = \"%282%2Au%2Av%29%2F%28u%2Bv%29\" = \"2%2A50%2A40%29%2F%2850+%2B+40%29\" = \"4000%2F90\" = 44.444 mph  (rounded).    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "For this formula see the lesson\r
\n" ); document.write( "\n" ); document.write( "    - Calculating an average speed: a train going from A to B and back \r
\n" ); document.write( "\n" ); document.write( "in this site.   Find there many other similar solved problems.\r
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