document.write( "Question 1043245: A and B can build a wall in 15 and 20 hrs resp.
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\n" ); document.write( "they worked together they use 180 bricks less
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\n" ); document.write( "the wall in 12 hrs . find how many bricks was
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Algebra.Com's Answer #689000 by josgarithmetic(39617)\"\" \"About 
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3600 bricks in one wall.\r
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\n" ); document.write( "\n" ); document.write( "Predicted wall building rate would be sum of rates of A and B, \"7%2F60\", being time \"8%264%2F7\" hours for 1 wall.\r
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\n" ); document.write( "\n" ); document.write( "Actual rate is given in description as \"1%2F12\" wall per hour.\r
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\n" ); document.write( "\n" ); document.write( "Difference in number of bricks PER HOUR given as 180.
\n" ); document.write( "If b is number of bricks in 1 wall, then
\n" ); document.write( "\"highlight_green%28b%2F%288%264%2F7%29-b%2F12=180%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28b=3600%29\", how many bricks in one wall.
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