SOLUTION: If 20 workers can complete a task in 12 hrs, how long will it take 30 workers?

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Question 752290: If 20 workers can complete a task in 12 hrs, how long will it take 30 workers?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
20 workers task 12 hours
1 worker task 12%2A20 hours.
Rate for 1 worker is 1%2F240 tasks per hour.

Now you have 30 workers. Rate? Reciprocal?

Rate of each worker is additive as more workers are placed to work.
30 workers each at 1%2F240 task per hour means highlight%2830%2A%281%2F240%29%29 task per hour. FIND RECIPROCAL for how many HOURS per TASK.



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In fact, 8 hours for 30 workers to do the task.