document.write( "Question 371243: Abu ran for 1/3 of an hour and then walked for half an hour at the rate of 3 km/h. In all, he had covered 4 km. How fast did he run? \n" ); document.write( "
Algebra.Com's Answer #264485 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let Abu's running rate be x km/h \n" ); document.write( "he ran for 1/3 hour \n" ); document.write( "so he ran a distance = 1/3 * x= x/3 km \n" ); document.write( ".. \n" ); document.write( "he walked for 1/2 hour speed = 3 km/h \n" ); document.write( "d= 1/2 * 3 = 3/2 km \n" ); document.write( ".. \n" ); document.write( "walking distance + running distance = 4 km \n" ); document.write( "3/2 +x/3 =4 \n" ); document.write( "-3/2 -3/2 \n" ); document.write( "x/3 = 4-3/2 \n" ); document.write( "x/3 = (8-3)/2 \n" ); document.write( "x/3 = 5/2 \n" ); document.write( "x = 3*5 /2 \n" ); document.write( "x= 15/2 \n" ); document.write( ".. \n" ); document.write( "running speed = 7.5 km/h \n" ); document.write( "... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |