document.write( "Question 885294: Pipe A fills a 100 gallon tub at a rate of 10 gallons a minute,
\n" ); document.write( "Pipe B fills the tub at a rate of 20 gallons a minute,
\n" ); document.write( "Hole C empties the tub at a rate of 5 gallons a minute,
\n" ); document.write( "how many minutes to fill the tub?\r
\n" ); document.write( "\n" ); document.write( "This question was in the movie \"How Green Was My Valley\"
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Algebra.Com's Answer #535051 by josgarithmetic(39623)\"\" \"About 
You can put this solution on YOUR website!
Uniform rates task or job problem.\r
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\n" ); document.write( "\n" ); document.write( "Fill 100 gallons is the job to be done. Sum of all the rates gives the effective rate for all of the openings. Rate for hole C is negative!\r
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\n" ); document.write( "\n" ); document.write( "Rate for all openings at the same time:
\n" ); document.write( "\"%2810%2B20-5%29%28gallons%2Fminute%29=highlight_green%2825%28gallons%2Fminute%29%29\".\r
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\n" ); document.write( "\n" ); document.write( "Next part is to do the 1 job of filling 100 gallons. Find time.
\n" ); document.write( "\"highlight%2825%2At=100%29\".
\n" ); document.write( "What is t?
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