Question
At first, Pail Q and Pail R contained 0.5 ℓ and 1.8 ℓ of water respectively. Some water from Pail R was poured into Pail Q with no water spilling over. In the end, there was as much water in Pail Q as in Pail R. How much water was poured from Pail R to Pail Q?
3 m

Click button first when a symbol is required. X

At first, Pail Q and Pail R contained 0.5 ℓ and 1.8 ℓ of water respectively. Some water from Pail R was poured into Pail Q with no water spilling over. In the end, there was as much water in Pail Q as in Pail R. How much water was poured from Pail R to Pail Q?