document.write( "Question 861354: I need explanation and solution:
\n" ); document.write( "Rustam can paint a wall in 1 hour and Anvar can paint the same wall in 2 hours. How long would it take Rustam and Anvar to paint this wall if they work together?
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Algebra.Com's Answer #518978 by mananth(16946)\"\" \"About 
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Rustam can paint in 1 hour\r
\n" ); document.write( "\n" ); document.write( "so he does 1 job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "Anwar takes 2 hours
\n" ); document.write( "so he does 1/2 job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "together they do 1+1/2 of the job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "3/2 of the job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "so for 1 job they together take 2/3 hours\r
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