Question
At first, Tank J and Tank K contained 0.4 ℓ and 1.6 ℓ of water respectively. Some water from Tank K was poured into Tank J with no water spilling over. In the end, there was as much water in Tank J as in Tank K. How much water was poured from Tank K to Tank J?
3 m

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At first, Tank J and Tank K contained 0.4 ℓ and 1.6 ℓ of water respectively. Some water from Tank K was poured into Tank J with no water spilling over. In the end, there was as much water in Tank J as in Tank K. How much water was poured from Tank K to Tank J?