document.write( "Question 1056785: One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 1/3 of a pool the second pump broke. The first pump finished the job. How long did it take to empty the pool? \n" ); document.write( "
Algebra.Com's Answer #671849 by MathTherapy(10551)\"\" \"About 
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One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 1/3 of a pool the second pump broke. The first pump finished the job. How long did it take to empty the pool?
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Both pumps worked for 4 hours, and emptied \"1%2F3\" of pool.
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document.write( "The 1st (slower) pump took 24 hours to empty remaining \"2%2F3\" of pool. 
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document.write( "Total time taken to empty pool: \"highlight_green%28matrix%281%2C4%2C+4+%2B+24%2C+or%2C+28%2C+hours%29%29\" \n" );
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