Question
At first, Tank Q and Tank R contained 0.2 ℓ and 4.6 ℓ of water respectively. Some water from Tank R was poured into Tank Q with no water spilling over. In the end, there was as much water in Tank Q as in Tank R. How much water was poured from Tank R to Tank Q?
3 m

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At first, Tank Q and Tank R contained 0.2 ℓ and 4.6 ℓ of water respectively. Some water from Tank R was poured into Tank Q with no water spilling over. In the end, there was as much water in Tank Q as in Tank R. How much water was poured from Tank R to Tank Q?