Папа по реке с течением доплывает от моста до пляжа за 9 минут, а обратно за 12 минут. Сын от моста - №3337696

Папа по реке с течением доплывает от моста до пляжа за 9 минут, а обратно за 12 минут. Сын от моста до пляжа доплывает за 12 минут,за сколько он доплывёт обратно?
- Предмет:
  Алгебра
- Автор:
  hailey27
- 5 лет назад

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