document.write( "Question 1201606: using 2 tractors a farmer can dig a farm in 20 days,he uses the 2 tractors for the first 8 days and added 6 more tractors to complete the work.how Long will it take to complete the work? \n" ); document.write( "
Algebra.Com's Answer #836064 by ikleyn(52852)\"\" \"About 
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\n" ); document.write( "using 2 tractors a farmer can dig a farm in 20 days. He uses the 2 tractors
\n" ); document.write( "for the first 8 days and added 6 more tractors to complete the work.
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\n" ); document.write( "\n" ); document.write( "                    Let' solve it MENTALLY.\r
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document.write( "Two tractors complete the job in 20 days.\r\n" );
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document.write( "Hence, two tractors make  \"1%2F20\"  of the job per day.\r\n" );
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document.write( "Working first 8 day, two tractors made  \"8%2F20\"  of the job.\r\n" );
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document.write( "Hence,  1 - \"8%2F20\" = \"%2820-8%29%2F20\" = \"12%2F20\"  of the job remained.\r\n" );
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document.write( "    6 more added tractors make total 2+6 = 8 tractors, \r\n" );
document.write( "    which is 4 times as many as 2 tractors.\r\n" );
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document.write( "    Hence, 8 tractors will do  \"4%2F20\"  of the job per day.\r\n" );
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document.write( "It means that 8 tractors need  \"%28%2812%2F20%29%29%2F%28%284%2F20%29%29\" = \"12%2F4\" = 3 days to complete the job.\r\n" );
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document.write( "ANSWER.  It will take 3 days to complete the job.\r\n" );
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