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17 Sep 2009, 10:33
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A work crew of 4 Men takes 5 days to complete one-half of a job. If 6 men are then added to the crew and the men continue to work at the same rate, how many days will it take the enlarged crew to do the rest of the job?
A) 2
B) 3
C) 3 1/3
D) 4
E) 4 4/5
A) 2
B) 3
C) 3 1/3
D) 4
E) 4 4/5
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17 Sep 2009, 16:31
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4 Men = 0.5 job in 5 days
=> \(4 men = \frac{0.5 job}{5 days}\)
Now, 6 more people are added, all having the same rate, and now 10 men have to complete 0.5 job
=> \(1 men = \frac{0.5 job}{20 days}\)
=> \(10 men = \frac{0.5 job}{2 days}\)
Hence, answer is 2 days..
=> \(4 men = \frac{0.5 job}{5 days}\)
Now, 6 more people are added, all having the same rate, and now 10 men have to complete 0.5 job
=> \(1 men = \frac{0.5 job}{20 days}\)
=> \(10 men = \frac{0.5 job}{2 days}\)
Hence, answer is 2 days..
18 Sep 2009, 23:11
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1 men can do 1/40 of the work.
now 10 men can finish the job in 4 days.Half-job they can do it in 2days
now 10 men can finish the job in 4 days.Half-job they can do it in 2days
