SOLUTION: The cost of labors varies directly with the number of workers and the number of days worked. If 16 people work 5 days for $9,600, how many days can 9 people work to earn $6,480?

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Question 633087: The cost of labors varies directly with the number of workers and the number of days worked. If 16 people work 5 days for $9,600, how many days can 9 people work to earn $6,480?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
16*5=80 man days
9600/80=960/8=120 dollars per man day
6480/120=54
54/9=6 days for 9 people to earn 6480 at a rate of $120 per day