document.write( "Question 1150208: Tara plans to take a bath but forgets to close the drain. The bath usually takes 10 minutes to fill and 12 minutes to empty. How long will it be before the bath is filled if Tara continues not to notice that the drain is open? \n" ); document.write( "
Algebra.Com's Answer #771615 by Edwin McCravy(20063)\"\" \"About 
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Tara plans to take a bath but forgets to close the drain. \r
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document.write( "So the rate is 1 tub per 10 minutes or 1/10 tub per minute

\n" ); document.write( "and 12 minutes to empty.
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document.write( "So the rate is -1 tub per 12 minutes or -1/12 tub per minute.
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document.write( "Since it fills faster than it empties, it will eventually be filled\r\n" );
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document.write( "Let the time for filling be t.\r\n" );
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document.write( "We use rate∙time = part of tub filled or emptied by both the faucet\r\n" );
document.write( "and the drain.  Then set that equal to 1 tubfull.\r\n" );
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document.write( "\"expr%281%2F10%29%2At-expr%281%2F12%29%2At=1\"\r\n" );
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document.write( "Multiply both sides by LCD = 60\r\n" );
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document.write( "\"6t-5t=60\"\r\n" );
document.write( "\"t=60\"\r\n" );
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document.write( "Answer: 60 minutes or 1 hour.\r\n" );
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document.write( "Edwin
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