document.write( "Question 667186: a man cycled for some time at 16 km/h and returned at 15 km/h . the total time taken was 7 3/4 hours . find the total distance he cycled ? \n" ); document.write( "
Algebra.Com's Answer #414935 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! a man cycled for some time at 16 km/h and returned at 15 km/h . the total time taken was 7 3/4 hours . find the total distance he cycled ? \n" ); document.write( ": \n" ); document.write( "Let d = the one-way distance \n" ); document.write( ": \n" ); document.write( "Write a time equation, time = dist /speed; change 7 \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "Multiply by 16*15; 240: \n" ); document.write( "15d + 16d = 240(7.75) \n" ); document.write( "31d = 1860 \n" ); document.write( "d = \n" ); document.write( "d = 60 km \n" ); document.write( ": \n" ); document.write( "Find the total distance he cycled? \n" ); document.write( "2(60) = 120 km \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check this by finding the time each way \n" ); document.write( "60/15 = 4 hrs \n" ); document.write( "60/16 = 3.75 hrs \n" ); document.write( "---------------- \n" ); document.write( "total time 7.75 hrs \n" ); document.write( " |