SOLUTION: 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?
Algebra ->
Rate-of-work-word-problems
-> SOLUTION: 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?
Log On
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? Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! 8 people finished 1/4 in 30 days to make 240 people-days of work.
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.
With 10 people, N=720/10=72 days.
