Question
Tank N was filled with water with water up to a height of 19 cm while Tank P and Tank Q were empty. Water was poured out into Tank P and Q such that the water in all tanks were the same height in the end. How much water was poured out of Tank N?
4 m

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Tank N was filled with water with water up to a height of 19 cm while Tank P and Tank Q were empty. Water was poured out into Tank P and Q such that the water in all tanks were the same height in the end. How much water was poured out of Tank N?