document.write( "Question 1159715: Ron and Landon are digging for the footer for a building. Ron can do the job alone in 20 hours. Landon can do the job alone in 30 hours. How long will it take both of them working together to do the job? \n" ); document.write( "
Algebra.Com's Answer #782769 by josgarithmetic(39620)\"\" \"About 
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\"1%2F%281%2F20%2B1%2F30%29\"\"hours\" \n" ); document.write( "
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