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)![]() ![]() You can put this solution on YOUR website! 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? \n" ); document.write( ": \n" ); document.write( "Find the one-way distance (dist = time * speed): \n" ); document.write( "6*50 = 300 mi \n" ); document.write( ": \n" ); document.write( "The round trip dist: 2 * 300 = 600 mi \n" ); document.write( ": \n" ); document.write( "The total time for the round trip: 6 + 7.5 = 13.5 hrs \n" ); document.write( ": \n" ); document.write( "Average speed = \n" ); document.write( "Av speed = |