document.write( "Question 354083: A tank can be filled by one pipe stream in 6 hours, and by another pipe stream in 4 hours. It can be emptied by third pipe stream in 7 hours. If the first pipe stream was opened two hours ahead of the second and third pipe streams, how long will it take to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #253098 by mananth(16946)![]() ![]() You can put this solution on YOUR website! first pipe = 6 hours \n" ); document.write( "so it can do 1/6 of the job in 1 hour. \n" ); document.write( "so in 2 hours it has done 1/3 of the of the job. \n" ); document.write( "Balance job remaining = 1-1/3 = 2/3 of the job. \n" ); document.write( "... \n" ); document.write( "Time taken by three pipes to complete balance job \n" ); document.write( "pipe 1- 4 hours \n" ); document.write( "pipe 2- 8/3 hours \n" ); document.write( "pipe 3 = 14/3 hours\r \n" ); document.write( "\n" ); document.write( "... \n" ); document.write( "1/4+3/8 -3/14 of the job they will do in 1 hour\r \n" ); document.write( "\n" ); document.write( "0.41 of the job they do in1 hour. \n" ); document.write( "1/0.41 hours they will take to do 2/3 of the job \n" ); document.write( "=2.4 hours \n" ); document.write( "+ 2hours (pipe one alone) \n" ); document.write( "= 4.4 hours \n" ); document.write( "... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |