It depends on the number of people on the shift!
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man hours are the total amount of hours each employee works. For example, 10 men working one 10 hour shift would be 100 man hours.
Man does (1/8) job in 1 hour. Child does (1/12) job in 1 hour.Working together, they do (1/8 + 1/12) of the job in 1 hour, or (3/24 + 2/24) = 5/24.(1 job) / (5/24 job per hour) = 24/5 = 4.8 hours = 4hours 48minutes
Average speed = (delta-X) / (delta-T) = (10 miles) / (2 hours) = 5 miles per hour
Well, if it took 6 men 6 hours to dig 6 holes, that means each man dug one hole in 6 hours. So, it would take 1 man 6 hours to dig one hole. Math doesn't lie, darling.
Man does (1/2) of task each hour. Woman does (1/3) of task each hour.Working together, they do (1/2 + 1/3) = 5/6 of task each hour.So it will take 6/5 hour = 1 hour 12minutes to do same task together, thengo off and shower together to practice good hygiene after job well done.