Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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If 8 men can complete a repair job in 5 days, how long will it take 4 men working 10 hours a day to complete the same job?

4 days
5 days
6 days
10 days

The correct answer is: 6 days

To solve this problem, start with the initial data provided: 8 men can complete the job in 5 days. This means that the total amount of work required for the job can be represented in terms of man-days. Calculating the total man-days for the job involves multiplying the number of men by the number of days they work. In this case: 8 men × 5 days = 40 man-days. Now, if we consider the situation with 4 men working 10 hours a day, we need to determine their total man-days. Given that they work 10 hours a day, we can assume that 4 men working for 1 day would provide: 4 men × 1 day = 4 man-days for that day. To find out how many days it would take for these 4 men to complete the same workload as 40 man-days, we can set up the equation with the requirement of the job. Since they are producing 4 man-days per day, the number of days required to gather 40 man-days of work would be: 40 man-days ÷ 4 man-days per day = 10 days. Thus, it would take 4 men, working 10 hours a day, a