Question
At first, Pot U and Pot V contained 0.9 ℓ and 1.2 ℓ of water respectively. Some water from Pot V was poured into Pot U with no water spilling over. In the end, there was as much water in Pot U as in Pot V. How much water was poured from Pot V to Pot U?
3 m

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At first, Pot U and Pot V contained 0.9 ℓ and 1.2 ℓ of water respectively. Some water from Pot V was poured into Pot U with no water spilling over. In the end, there was as much water in Pot U as in Pot V. How much water was poured from Pot V to Pot U?