document.write( "Question 525537: A swimming pool can be filled up in 4 hours by pipe A, 3 hours by pipe B, and 6 hours by pipe C. At 8:00am, these three pipes started working together. After one hour, pipe B was turned off, pipe A and C continued. What was the exact time when the swimming pool was filled up? \n" ); document.write( "
Algebra.Com's Answer #348143 by lwsshak3(11628)\"\" \"About 
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A swimming pool can be filled up in 4 hours by pipe A, 3 hours by pipe B, and 6 hours by pipe C. At 8:00am, these three pipes started working together. After one hour, pipe B was turned off, pipe A and C continued. What was the exact time when the swimming pool was filled up?
\n" ); document.write( "**\r
\n" ); document.write( "\n" ); document.write( "1/4=work rate of pipe A
\n" ); document.write( "1/3=work rate of pipe B
\n" ); document.write( "1/6=work rate of pipe C
\n" ); document.write( "let x=time it took to fill swimming pool
\n" ); document.write( "Work done=work rate*time on job
\n" ); document.write( "x/4+x/6+1/3=100%=1
\n" ); document.write( "LCD=12
\n" ); document.write( "3x+2x+4=12
\n" ); document.write( "3x+2x+4=12
\n" ); document.write( "5x=8
\n" ); document.write( "x=8/5=1+3/5 hour=1 hr and 36 min
\n" ); document.write( "ans:
\n" ); document.write( "Exact time when the swimming pool was filled up: 9:36 am \n" ); document.write( "
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