document.write( "Question 887483: a pump can empty a small pond in 5hr. another more efficient pump can do the job in 3hr. how long would it take to empty the pond if both pumps were used? \n" ); document.write( "
Algebra.Com's Answer #536652 by josgarithmetic(39617)\"\" \"About 
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This combination of rates is simple addition. One job is \"empty the pond\".\r
\n" ); document.write( "\n" ); document.write( "\"1%2F5%2B1%2F3\" is the combined rate in JOBS per HOUR.
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