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document.write( "As the tutors fight each other for egos, I'll reword the question:\r\n" );
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document.write( "A farmer ploughs his land in 12 days if he uses 5 tractors (with operators)\r\n" );
document.write( "how long will it take if he uses only 3 tractors (with operators).\r\n" );
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document.write( "They've already solved it, but let's use the \"worker-time-job\" formula,\r\n" );
document.write( "which even takes into account the number of jobs required to be done.\r\n" );
document.write( "In this case the number of jobs to be done in both situations is 1, so\r\n" );
document.write( "J1 = J2 = 1. \r\n" );
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\r\n" );
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document.write( "where\r\n" );
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document.write( "W1 = the number of workers in the first situation.\r\n" );
document.write( "T1 = the number of time units (days in this problem) in the first situation.\r\n" );
document.write( "J1 = the number of jobs in the first situation.\r\n" );
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document.write( "W2 = the number of workers in the second situation.\r\n" );
document.write( "T2 = the number of time units (days) in the second situation.\r\n" );
document.write( "J2 = the number of jobs in the second situation.\r\n" );
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document.write( "W1 = 5 W2 = 3 \r\n" );
document.write( "T1 = 12 T2 = the unknown quantity \r\n" );
document.write( "J1 = 1 J2 = 1\r\n" );
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document.write( "
\r\n" );
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document.write( "
\r\n" );
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document.write( "
\r\n" );
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document.write( "Answer: 20 days. \r\n" );
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document.write( "Edwin
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document.write( "![\"\"](\"/images/stars/stars-13.gif\")
