Final answer:
Approximately 65 cups can be completely filled using the water in the water container.
Step-by-step explanation:
To find the number of cups that can be completely filled using the water in the container, we need to divide the total amount of water in the container by the amount of water a cup can hold.
First, we convert the volume of water in the container from liters to milliliters: 21.5 liters = 21.5 * 1000 ml = 21500 ml.
Now we divide the volume of water in the container by the volume of water a cup can hold: 21500 ml / 330 ml = 65.15 cups.
So, approximately 65 cups can be completely filled using the water in the water container.
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