Question
At first, Tank A and Tank B contained 0.5 ℓ and 1.7 ℓ of water respectively. Some water from Tank B was poured into Tank A with no water spilling over. In the end, there was as much water in Tank A as in Tank B. How much water was poured from Tank B to Tank A?
3 m

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At first, Tank A and Tank B contained 0.5 ℓ and 1.7 ℓ of water respectively. Some water from Tank B was poured into Tank A with no water spilling over. In the end, there was as much water in Tank A as in Tank B. How much water was poured from Tank B to Tank A?