document.write( "Question 1094907: Darren drives to school in rush hour traffic and averages 21 mph. He returns home in mid-afternoon when there is less traffic and averages 42 mph. What is the distance between his home and school if the total traveling time is 1hr30min?
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #709474 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! His afternoon speed is exactly twice his morning speed, so the afternoon trip takes exactly half as long as the morning trip. \n" ); document.write( "Since the total driving time was an hour and a half, the morning trip took an hour and the afternoon trip took half an hour. \n" ); document.write( "Using the time and average speed for either the morning or afternoon trip shows the driving distance to be 21 miles: \n" ); document.write( " |