document.write( "Question 610774: Sara travels up a hill at 20 mph. and back down at 160 mph. what is the average speed for the entire trip? \n" ); document.write( "
Algebra.Com's Answer #384608 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Sara travels up a hill at 20 mph. and back down at 160 mph. what is the average speed for the entire trip? \n" ); document.write( "---------------- \n" ); document.write( "Avg = 2*20*160/(20 + 160) = 6400/180 \n" ); document.write( "Avg = 320/9 mi/hr \n" ); document.write( "Ave = 35.777... mi/hr \n" ); document.write( " \n" ); document.write( " |