Barrel water remainder

There are 1.5 hectoliters of rainwater in the barrel. Two-fifths of the water passed from the barrel while watering the garden. How many liters of water remained in the barrel?

Final Answer:

x =  90 l

Step-by-step explanation:

$$\begin{gathered} S=1.5\text{hl}\to \text{l}=1.5\cdot 100\text{l}=150\text{l} \\ V=\frac{2}{5}\cdot S=\frac{2}{5}\cdot 150=\frac{2\cdot 150}{5}=\frac{300}{5}=60\text{l} \\ x=S-V=150-60=90\text{l} \end{gathered}$$

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