Answer:

4.5hours.

Step-by-step explanation:

Let us find the man-hour rate of 6people

= 6man x 9 hours

= 54

let us say that the 6 people added is as experience and hard working as the original 6, they have the same man-hour rate.

6/54 + 6/54 = 2/9

Inverse of 2/9 = 9/2 = 4.5hours

Answer:

It would take 4.5 hours

Step-by-step explanation:

cus if we do dat and dat and dat we get dat and dat so dat is the dat and we get dat answer 4.5

well it is what it is...

u divide 6 by 12 and u get 2 and take dat thick number 2 and divide it with big chunky 9 over there and we get 4.5 BOOM im da best