How long is a swimming pool in m?

The question refers to an unspecified swimming pool, so there is no information to provide a specific answer regarding its length. The length of swimming pools can vary considerably based on the type and purpose of the pool, such as lap or recreational pools, and they can range anywhere from a few meters to dozens of meters.

If this query pertains to a particular swimming pool and you have relevant information or context, feel free to provide specific dimensions or ask a more pointed question.