document.write( "Question 764402: (1).
\n" ); document.write( "8 labourers do a work in 50 days . if the number of men are doubled , then in how many days will the same work be done ?
\n" ); document.write( "(2). 130 men dig a ttunnel in 170 days . how many men will complete this task in 140 days ?
\n" ); document.write( "(3).
\n" ); document.write( "average of 5 numbers is 60 .sum of first two is 100 and last two is 160. find the fifth number?? \n" ); document.write( "

Algebra.Com's Answer #465422 by josgarithmetic(39633) $\"\"$ $\"About$

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Find the rates of one man, for your questions #1 and #2. The question parts will then be simple to answer.\r
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\n" ); document.write( "\n" ); document.write( "You have the describable form, N laborers do a job in D days. The rate for one man is then $\"N%2FN\"$ laborers does a job in $\"D%2AN\"$ days. Think how that works! The rate for one man in DAYS per JOB would then be $\"1%2F%28D%2AN%29\"$ .\r
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\n" ); document.write( "\n" ); document.write( "Next you want to understand that when workers are working at the same time, then their individual rates are added. \r
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\n" ); document.write( "\n" ); document.write( "In both #1 and #2, you will use $\"R%2At=j\"$ where $\"R\"$ is the working rate, $\"t\"$ is time, and $\"j\"$ is how much or many jobs. In #1, the unknown variable to solve will be $\"t\"$ . In #2, the unknown variable to solve will be part of the rate ----- a whole number factor representing the rate for the group of unknown quantity of workers. \n" ); document.write( "

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