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

Question 752290: If 20 workers can complete a task in 12 hrs, how long will it take 30 workers?
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!
20 workers task 12 hours
1 worker task hours.
Rate for 1 worker is 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 task per hour means task per hour. FIND RECIPROCAL for how many HOURS per TASK.

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