document.write( "Question 301078: How do I set up this question?
\n" ); document.write( "A large drain and a small drain are opened to drain a pool. The large drain can empty the pool in 6 hours. After both drains have been open 1 hour the large drain becomes clogged and is closed. The small drain remains open and requires 9 hours to empty the pool. How long would it have taken for the small drain working alone to empty the pool? \n" ); document.write( "
Algebra.Com's Answer #215894 by ankor@dixie-net.com(22740)\"\" \"About 
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A large drain and a small drain are opened to drain a pool.
\n" ); document.write( " The large drain can empty the pool in 6 hours.
\n" ); document.write( " After both drains have been open 1 hour the large drain becomes clogged and is closed.
\n" ); document.write( " The small drain remains open and requires 9 hours to empty the pool.
\n" ); document.write( " How long would it have taken for the small drain working alone to empty the pool?
\n" ); document.write( ":
\n" ); document.write( "Let x = time for small drain alone
\n" ); document.write( ":
\n" ); document.write( "Let the completed job (a drained pool) = 1
\n" ); document.write( ":
\n" ); document.write( "Assume the small drain has been open for a total of 10 hrs
\n" ); document.write( "\"1%2F6\" + \"10%2Fx\" = 1
\n" ); document.write( "multiply equation by 6x:
\n" ); document.write( "x + 10(6) = 6x
\n" ); document.write( "60 = 6x - x
\n" ); document.write( "5x = 60
\n" ); document.write( "x = \"60%2F5\"
\n" ); document.write( "x = 12 hrs, small drain alone
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