Question
At first, Jar J and Jar K contained 0.9 ℓ and 4.1 ℓ of water respectively. Some water from Jar K was poured into Jar J with no water spilling over. In the end, there was as much water in Jar J as in Jar K. How much water was poured from Jar K to Jar J?
3 m

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At first, Jar J and Jar K contained 0.9 ℓ and 4.1 ℓ of water respectively. Some water from Jar K was poured into Jar J with no water spilling over. In the end, there was as much water in Jar J as in Jar K. How much water was poured from Jar K to Jar J?