Question
At first, Bottle N and Bottle P contained 0.8 ℓ and 3.1 ℓ of water respectively. Some water from Bottle P was poured into Bottle N with no water spilling over. In the end, there was as much water in Bottle N as in Bottle P. How much water was poured from Bottle P to Bottle N?
3 m

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At first, Bottle N and Bottle P contained 0.8 ℓ and 3.1 ℓ of water respectively. Some water from Bottle P was poured into Bottle N with no water spilling over. In the end, there was as much water in Bottle N as in Bottle P. How much water was poured from Bottle P to Bottle N?