document.write( "Question 909693: A 100 liter storage tank is to be filled with solvent from two pipes, A and B. solvent A is pumped at a rate of 25litres/min. Solvent B is pumped at a rate of 40 liters/min. How many additional minutes are required to fill up the storage tank, if pipe A is opened 4 minutes before pipe B? \n" ); document.write( "
Algebra.Com's Answer #552003 by josgarithmetic(39613)\"\" \"About 
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Let t be the unknown minutes during both pipes open together;\r
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\n" ); document.write( "\n" ); document.write( "RATES------------------
\n" ); document.write( "Pipe A, 25 liters/minute
\n" ); document.write( "Pipe B, 40 liters/minute
\n" ); document.write( "A&B, 65 liters/minute\r
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\n" ); document.write( "\n" ); document.write( "The question is a uniform rates situation, \"highlight_green%28RT=V%29\", rate time volume.\r
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\n" ); document.write( "\n" ); document.write( "Four minutes with just pipe A and then unknown t minutes for pipes A and B together.\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28highlight%2825%2A4%2B65%2At=100%29%29\"\r
\n" ); document.write( "\n" ); document.write( "Solve for t.
\n" ); document.write( "The outlined equation is the most important part of the solution.
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