document.write( "Question 852670: a swimming pool can be filled in 15 hours if water enters through a pipe alone, or in 22 hours if water enters through a hose alone. If water is entering through both the pipe and the hose, how long will it take to fill the pool 4/5 full? \n" ); document.write( "
Algebra.Com's Answer #513554 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
a swimming pool can be filled in 15 hours if water enters through a pipe alone, or in 22 hours if water enters through a hose alone. If water is entering through both the pipe and the hose, how long will it take to fill the pool 4/5 full?
\n" ); document.write( "***
\n" ); document.write( "let x=time it takes to fill the pool 4/5 full if water is entering through both pipe and hose.
\n" ); document.write( "1/15=flow rate of pipe
\n" ); document.write( "1/22=flow rate of hose
\n" ); document.write( "amt of water=time of flow*flow rate
\n" ); document.write( "...
\n" ); document.write( "\"x%2F15%2Bx%2F22=4%2F5\"
\n" ); document.write( "(22x+15x)/22*15=4/5
\n" ); document.write( "37x/330=4/5
\n" ); document.write( "185x=1320
\n" ); document.write( "x≈7.14
\n" ); document.write( "time it takes to fill the pool 4/5 full≈7.14 hrs \n" ); document.write( "
\n" );