An underground spring fills a small pond in 12 days. Evaporation from the surface of the pond can empty it in 28 days. If the pond is completely dry, how long will it take to fill again

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Answer:

12 days

Step-by-step explanation:

It takes 12 days for an underground spring to fill a small pond

It takes 28 days for the pond to be empty through evaporation

If the pond is completely dry, how long will it take to fill again?

It will take 12 days for the underground spring to fill the pond again