document.write( "Question 957366: A journey of 540Km is completed in 7 hr. 30 minutes. If 2/3 of the journey is completed at 80 Km/hr. At what speed is the remaining journey completed. \n" ); document.write( "
Algebra.Com's Answer #585108 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! A journey of 540Km is completed in 7 hr. 30 minutes. \n" ); document.write( " If 2/3 of the journey is completed at 80 Km/hr. \n" ); document.write( " At what speed is the remaining journey completed. \n" ); document.write( ": \n" ); document.write( "Let s = the av speed the last third of the journey \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "then \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "Write a time equation, time = dist/speed \n" ); document.write( "; \n" ); document.write( "80km/h time + s km/h time = total time (7.5 hrs) \n" ); document.write( " \n" ); document.write( "4.5 + \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "180 = 3s \n" ); document.write( "s = 180/3 \n" ); document.write( "s = 60 km/hr for the remainder of the journey \n" ); document.write( " \n" ); document.write( " |