Question
At first, Pail C and Pail D contained 0.9 ℓ and 2.7 ℓ of water respectively. Some water from Pail D was poured into Pail C with no water spilling over. In the end, there was as much water in Pail C as in Pail D. How much water was poured from Pail D to Pail C?
3 m

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At first, Pail C and Pail D contained 0.9 ℓ and 2.7 ℓ of water respectively. Some water from Pail D was poured into Pail C with no water spilling over. In the end, there was as much water in Pail C as in Pail D. How much water was poured from Pail D to Pail C?