Container with water

The cube-shaped container is filled with water to half its height. If we add 20 liters of water, the company will fill the container to three-quarters of its height. What is the volume of the whole container?

Correct answer:

V =  80 l

Step-by-step explanation:

2V+20=43 V  V/2+20=3/4 V  V=80  V=180=80  V=80=80 l

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