document.write( "Question 372451: One grocery clerk can stock a shelf in 35 min. A second clerk requires 40 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together? \n" ); document.write( "
Algebra.Com's Answer #265291 by mananth(16946)\"\" \"About 
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one clerk 35 minutes
\n" ); document.write( "other clerk 40 minutes
\n" ); document.write( "..
\n" ); document.write( "first clerk 1/35 of the job in 1 minute
\n" ); document.write( "second clerk 1/40 of the job in 1 minute
\n" ); document.write( "..
\n" ); document.write( "together they do 1/35 + 1/40 of the job in 1 minute
\n" ); document.write( "=(40+35)/40*35
\n" ); document.write( "=75/1400
\n" ); document.write( "=3/56 of the job in 1 minute
\n" ); document.write( "so they will take 56/3 = 18.66 hours together.
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca
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