document.write( "Question 194340: David travels for 6 hours at a rate of 50 mph. his return trip takes him 7.5 hrs. what is his average speed for the whole trip? \n" ); document.write( "
Algebra.Com's Answer #145853 by ankor@dixie-net.com(22740)\"\" \"About 
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David travels for 6 hours at a rate of 50 mph.
\n" ); document.write( "his return trip takes him 7.5 hrs.
\n" ); document.write( " what is his average speed for the whole trip?
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\n" ); document.write( "Find the one-way distance (dist = time * speed):
\n" ); document.write( "6*50 = 300 mi
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\n" ); document.write( "The round trip dist: 2 * 300 = 600 mi
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\n" ); document.write( "The total time for the round trip: 6 + 7.5 = 13.5 hrs
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\n" ); document.write( "Average speed = \"dist%2Ftime\"
\n" ); document.write( "Av speed = \"600%2F13.5\" = 44.44 mph
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