document.write( "Question 752523: If one person digs a trench in 5 hours, and another person digs a trench in 6 hours, how many hours will it take both of them to dig one trench? \n" ); document.write( "

Algebra.Com's Answer #457787 by checkley79(3341) $\"\"$ $\"About$

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1/5+1/6=1/x
\n" ); document.write( "(6+5)/5*6=1/x
\n" ); document.write( "11/30=1/x
\n" ); document.write( "11x=30
\n" ); document.write( "x=30/11
\n" ); document.write( "x=2.73 hours ans. \n" ); document.write( "

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