Three-quarters of its volume

The pool has a block shape with a length of 8m, a width of 5.3m and a depth of 1.5m. How many hl of water is in it if it is filled to three-quarters of its volume?

Correct result:

V =  477 hl

Solution:

$$\begin{gathered} a=8\text{ m } \\ b=5.3\text{ m } \\ c=1.5\text{ m } \\ {V}_1=a\cdot b\cdot c=8\cdot 5.3\cdot 1.5={\displaystyle \frac{318}{5}}=63.6{\text{m}}^3 \\ {V}_2=V_1\to \text{ hl}=V_1\cdot 10\text{ hl}=63.6\cdot 10\text{ hl}=636\text{ hl } \\ V={\displaystyle \frac{3}{4}}\cdot V_2={\displaystyle \frac{3}{4}}\cdot 636=477\text{ hl} \end{gathered}$$

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