Algebra.Com's Answer #726816 by ikleyn(52781)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "The SIMPLEST and the MOST RELIABLE way to solve this problem is THIS:\r\n" );
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document.write( "In the first scenario, the rate of work of one worker in one hour is equal to   .\r\n" );
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document.write( "Let x be how long will it take to plough the 9 hectare field with 5 workers, in hours.\r\n" );
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document.write( "In the second scenario, the rate of work of one worker in one hour is equal to  .\r\n" );
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document.write( "The rate is (assumed) the same, which gives you an equation (proportion)\r\n" );
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document.write( " = .\r\n" );
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document.write( "Simplify by canceling common factors (which is \"5\" in this case):\r\n" );
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document.write( " =  .\r\n" );
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document.write( "Now solve for x, as you solve any proportion\r\n" );
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document.write( "x =  =  = 12.\r\n" );
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document.write( "Answer. 12 hours.\r\n" );
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document.write( "By doing in this way, you will NEVER make a mistake.\r
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document.write( "To see other solved similar problem by the same method, look into the lesson\r
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document.write( " - Rate of work problems \r
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document.write( "in this site.\r
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