9 men taking 5 hours = 9 x 5 = 45 hour job
3 men doing a 45 hour job = 45 / 3 = 15 hours
It would still take six hours.
The way to calculate this is to figure out what fraction each does in an hour (1/20 of the job, vs. 1/25 of the job). Add the fractions together to see how much they do together in an hour, then take the reciprocal to find out how many hours it takes them.
Eight hours.
3 hours
Sally does 1 job in 4 hours ===> 1/4th of the job per hour.John does 1 job in 6 hours ===> 1/6th of the job per hour.Working together, they do (1/4 + 1/6) = (3/12 + 2/12) = 5/12 job per hour.The job takes 12/5 = 2.4 hours = 2hours24minutes to complete.
It would still take six hours.
as long as the job takes
Assuming the same rate of speed, if it takes 2 people 6 hours to do a job, it will take 1 person 12 hours to do the same job. In each case, the number of work hours (2 x 6, 1 x 12) is the same.
it will take them 2 hours and a half to work together on the driveways. but it depends on how far the driveways are from each other
My somewhat educated guess would be two hours. The person who could complete the job in 3 hours could complete 2/3 of the job in two hours. The person that complete the job in 6 hours could complete 1/3 of the job in two hours. 2/3 + 1/3 = 1.
The way to calculate this is to figure out what fraction each does in an hour (1/20 of the job, vs. 1/25 of the job). Add the fractions together to see how much they do together in an hour, then take the reciprocal to find out how many hours it takes them.
The job takes 3.5 to 4.0 hours to pull the transmission estimate to rebuild it - $1,700
fifteen 9 x 5 = 45 45 / 3 = 15
Eight hours.
3 hours
10 hrs
between 24-48 hours depending on 1, the quality of the gloss, and 2, how thick you apply it. Have fun! Its a crap job!!!