# Water container

The cube-shaped container is filled to two-thirds of its height. If we pour 18 liters, it will be filled to three-fifths of the height. What is the volume of the whole container?

Result

V =  270 l

#### Solution:

$V=a^3=a^2 \ v \ \\ \ \\ \ \\ 2/3 \cdot \ V - 18=3/5 \cdot \ V \ \\ \ \\ V=270 \ \\ \ \\ V=270 \ \\ =270 \ \text{l}$

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