I think that'd be 8 hours. 6/3 = 2 hours/worker. One less worker, 2 more hours.
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nine hours
Each bricklayer can complete 1/3 of the wall in 6 hours.
Two brick layers can complete 2/3 of a wall in 6 hours (2 x 1/3).
To complete the other 1/3 of the wall, the two brick layers would need another 3 hours.
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To determine how many workers are needed to build the cabin in 32 hours, we can use the formula: (workers) x (time) = constant. In this case, the constant is the same amount of work needed to build the cabin. So, 8 workers x 60 hours = 480 worker-hours. To build the cabin in 32 hours, we divide the constant (480 worker-hours) by the new time (32 hours) to find that 15 workers are needed to build the cabin in 32 hours.
It takes 3 x 6 = 18 man hours to dig 12 holes. Therefore it takes 18/12 = 1.5 man hours to dig 1 hole. To dig 9 holes takes 9 x 1.5 man hours = 13.5 man hours If 2 men are working then they take 13.5/2 = 6.75 hours or 6 hours 45 minutes.
It takes 112/70 = 1.6 hours.It takes 112/70 = 1.6 hours.It takes 112/70 = 1.6 hours.It takes 112/70 = 1.6 hours.
It takes 240/50 = 4.8 hours.It takes 240/50 = 4.8 hours.It takes 240/50 = 4.8 hours.It takes 240/50 = 4.8 hours.
It takes 316/70 = 4.51 hours.It takes 316/70 = 4.51 hours.It takes 316/70 = 4.51 hours.It takes 316/70 = 4.51 hours.