Safe man hours is the number of hours worked minus the number of hours lost due to unsafe work or lost work due to an incident. This should get you the answer to total safe man hours.
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Taking into consideration that each man works an 8 hour work day: (4 x 8) x 48 = 1536 man hours to complete the job for 4 men *** (Men x Man hours per day) x Days Worked = Total Job Man Hours *** 1536 / (3 x 8) = 64 days for 3 men to complete the same job *** Total Job Man Hours / (Men x Man Hours per day) = Days until Job Completion***
Oh, dude, you're really testing my math skills here. So, like, if you have 4 and 3/4 hours, that's like 19 quarter hours. You just divide the total hours by 0.25 to get the number of quarter hours. Math, man, it's everywhere.
That depends on how many men there are. If there is 1 man, then he does 7,000,000 man-hours of work in 7,000,000 hours, or about 798 years of continuous work. If there are 1,000 men, then they do 7,000,000 man-hours of work in 7,000 hours, or about 292 days of continuous work. If there are 100,000 men, then they do 7,000,000 man-hours of work in 70 hours, or about 2.917 days of continuous work. The problem we have with this question is that a "man-hour" is not a unit of time.
No, the plural form for 'man hour', the amount of work that one person can do in one hour, is man hours.
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