document.write( "Question 1006498: A cistern can be filled by two pipes. The small pipe alone will take 24 minutes longer than the larger pipe to fill the cistern alone. The small pipe alone will take 32 minutes longer to fill the cistern alone when the two pipes are operating together. How long will it take for the larger pipe to fill the cistern alone? \n" ); document.write( "
Algebra.Com's Answer #622647 by josmiceli(19441)\"\" \"About 
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Let \"+t%5B1%5D+\" = time in minutes for the larger pipe
\n" ); document.write( "to fill cistern when filling alone
\n" ); document.write( "Rate of filling = \"+1%2Ft%5B1%5D+\"
\n" ); document.write( "Let \"+t%5B2%5D+\" = time in minutes for both pipes to
\n" ); document.write( "fill cistern when filling together
\n" ); document.write( "---------------------------
\n" ); document.write( "\"+t%5B1%5D+%2B+24+\" = time in minutes for smaller pipe to
\n" ); document.write( "fill cistern when filling alone
\n" ); document.write( "Rate of filling = \"+1%2F%28+t%5B1%5D+%2B+24+%29+\"
\n" ); document.write( "\"+t%5B2%5D+%2B+32+\" = this is also time in minutes for smaller pipe to
\n" ); document.write( "fill cistern when filling alone
\n" ); document.write( "----------------------------
\n" ); document.write( "\"+t%5B1%5D+%2B+24+=+t%5B2%5D+%2B+32+\"
\n" ); document.write( "\"+t%5B2%5D+=+t%5B1%5D+-+8+\"
\n" ); document.write( "-----------------------------
\n" ); document.write( "Add their rates of filling alone to get rate filling together
\n" ); document.write( "\"+1%2Ft%5B1%5D+%2B+1%2F%28+t%5B1%5D+%2B+24+%29+=+1%2F%28+t%5B1%5D+-+8+%29+\"
\n" ); document.write( "Multiply both sides by \"+t%5B1%5D%2A%28+t%5B1%5D+%2B+24+%29%2A%28+t%5B1%5D+-+8+%29+\"
\n" ); document.write( "---------------------------------------------
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\"+t%5B1%5D%5E2+-+16t%5B1%5D++=+192+\"
\n" ); document.write( "Complete the square
\n" ); document.write( "\"++t%5B1%5D%5E2+-+16t%5B1%5D+%2B+%2816%2F2%29%5E2+=+192+%2B+%2816%2F2%29%5E2+\"
\n" ); document.write( "\"++t%5B1%5D%5E2+-+16t%5B1%5D+%2B+64+=+192+%2B+64+\"
\n" ); document.write( "\"+%28+t%5B1%5D+-+8+%29%5E2+=+256+\"
\n" ); document.write( "\"+%28+t%5B1%5D+-+8+%29%5E2+=+16%5E2+\"
\n" ); document.write( "\"+t%5B1%5D+-+8+=+16+\"
\n" ); document.write( "\"+t%5B1%5D+=+24+\"
\n" ); document.write( "The larger pipe takes 24 min filling alone
\n" ); document.write( "check:
\n" ); document.write( "\"+1%2Ft%5B1%5D+%2B+1%2F%28+t%5B1%5D+%2B+24+%29+=+1%2F%28+t%5B1%5D+-+8+%29+\"
\n" ); document.write( "\"+1%2F24+%2B+1%2F%28+24+%2B+24+%29+=+1%2F%28+24+-+8+%29+\"
\n" ); document.write( "\"+1%2F24+%2B+1%2F48+=+1%2F16+\"
\n" ); document.write( "\"+2%2F48+%2B+1%2F48+=+3%2F48+\"
\n" ); document.write( "\"+3%2F48+=+3%2F48+\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );