Final answer:
Ellen will pour 1 liter of water into Pitcher B so that it has exactly one more liter than Pitcher A.
Step-by-step explanation:
Calculating Water Volume Needed for Pitcher B
To determine how much water Ellen will pour into Pitcher B, we need to consider the amount of water in Pitcher A. If Pitcher A contains a certain volume of water, Pitcher B must end up with that volume plus one additional liter. Assuming we do not know the exact volume of Pitcher A, we can represent it as 'A' liters. Then Pitcher B, which we represent as 'B' liters, must have 'A + 1' liters.
In mathematical terms, if A = B, and Ellen needs to pour water into Pitcher B until Pitcher B has 1 more liter than Pitcher A, then the amount of water added to Pitcher B will be 1 liter because we align A and B to the same volume before adding the additional liter.
Based on the given information, we can conclude that Ellen will pour 1 liter of water into Pitcher B to achieve the desired volume difference between the pitchers.