document.write( "Question 336594: A crew of 8 people finished 1/4 of a tunnel through a mountain in 30 days. If they added 2 more workers, how long will it take them to finish the tunnel? \n" ); document.write( "
Algebra.Com's Answer #241238 by Fombitz(32388)\"\" \"About 
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8 people finished 1/4 in 30 days to make 240 people-days of work.
\n" ); document.write( "You need to accomplish 3 times as much work to complete the remaining 3 quarters of the tunnel so you need 3(240)=720 people-days of work.
\n" ); document.write( "With 10 people, N=720/10=72 days.
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