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Well for a competitive swimmer in longcourse it should be about 4-6 ( depends on age an level) so the average person that doesn't practice swimming probably 15 minutes if they could even finish it( depending on how physically fit they are and how their general technique is in swimming) 400 meters is a lot for someone who doesn't swim- thats 16 laps in a shortcourse pool and 8 in a longcourse.

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12y ago

What else can I help you with?