SOLUTION: If 5 people take 48 minutesto do a job how long can 12 people take to do the same job

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Question 1020935: If 5 people take 48 minutesto do a job how long can 12 people take to do the same job
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The job will take 5*48 = 240 people-minutes to complete.
==> %281%2F%28240+people-minutes%29%29%2A%28x+minutes%29%2A%2812+people%29+=+1
==> %2812x%29%2F240+=+1, or
x%2F20+=+1 ==> x = 20 minutes.
Therefore it will take 20 minutes for 12 people to do the same job.