document.write( "Question 761773: a motorist travelled 115km on an expressway at an average speed of 92km/h & another 45 minutes on other roads. If the average speed for his whole journey was 80km/h,how far did he travel on the other roads? \n" ); document.write( "
Algebra.Com's Answer #463454 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Time = Distance/Speed = 115/92 = 1.25hours \n" ); document.write( "45 mins/60 mins = 0.75hours \n" ); document.write( "1.25 + 0.75 = 2.00 hours. \n" ); document.write( "Distance = Speed * Time = 80 * 2 = 160miles \n" ); document.write( "Therefore 160km - 115km = 45km \n" ); document.write( "He travelled 45km on other roads. \n" ); document.write( "Hope this helps. \n" ); document.write( ":-) \n" ); document.write( " |