document.write( "Question 816156: Two pipes can fill a tank in 15 minutes if both are turned on. If only one is used, it would take 25 minutes longer for the smaller pipe to fill the tank than the larger pipe. How long will it take for the smaller pipe to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #491392 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Add their individual rates of filling
\n" ); document.write( "to get their rate filling together
\n" ); document.write( "Let \"+t+\" = time in minutes for
\n" ); document.write( "the larger pipe to fill the tank
\n" ); document.write( "\"+t+%2B+25+\" = time in minutes for
\n" ); document.write( "the smaller pipe to fill tank
\n" ); document.write( "----------------------------------
\n" ); document.write( "( 1 tank filled / t min ) + ( 1 tank filled ) / t+25 min ) =
\n" ); document.write( "( 1 tank filled / 15 min )
\n" ); document.write( "\"+1%2Ft+%2B+1%2F%28+t%2B25+%29+=+1%2F15+\"
\n" ); document.write( "Multiply both sides by \"+15%2At%2A%28+t%2B25+%29+\"
\n" ); document.write( "\"+15%2A%28+t%2B25+%29+%2B+15t+=+t%2A%28+t%2B25+%29+\"
\n" ); document.write( "\"+15t+%2B+15%2A25+%2B+15t+=+t%5E2+%2B+25t+\"
\n" ); document.write( "\"+30t+%2B+375+=+t%5E2+%2B+25t+\"
\n" ); document.write( "\"+t%5E2+-+5t+-+375+=+0+\"
\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+1+\"
\n" ); document.write( "\"+b+=+-5+\"
\n" ); document.write( "\"+c+=+-375+\"
\n" ); document.write( "\"x+=+%28-%28-5%29+%2B-+sqrt%28+%28-5%29%5E2-4%2A1%2A%28-375%29+%29%29%2F%282%2A1%29+\"
\n" ); document.write( "\"x+=+%28+5+%2B-+sqrt%28+25+%2B+1500+%29%29+%2F+2+\"
\n" ); document.write( "\"x+=+%28+5+%2B-+sqrt%28+1525+%29%29+%2F+2+\"
\n" ); document.write( "You can finish- I don't have calculator\r
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