Question
At first, Pot B and Pot C contained 0.4 ℓ and 3.5 ℓ of water respectively. Some water from Pot C was poured into Pot B with no water spilling over. In the end, there was as much water in Pot B as in Pot C. How much water was poured from Pot C to Pot B?
3 m

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At first, Pot B and Pot C contained 0.4 ℓ and 3.5 ℓ of water respectively. Some water from Pot C was poured into Pot B with no water spilling over. In the end, there was as much water in Pot B as in Pot C. How much water was poured from Pot C to Pot B?