Block-shaped 13521

A block-shaped aquarium with dimensions of 82 cm, 30 cm, at 7.6 cm is filled with 70% water. How many liters of water is in it? What height does the water reach? From what% of the sidewall area is wetting?

Correct answer:

V =  130.872 l
h =  5.32 dm
p =  70 %

Step-by-step explanation:

$$\begin{gathered} a=82\text{cm}\to \text{dm}=82:10\text{dm}=8.2\text{dm} \\ b=30\text{cm}\to \text{dm}=30:10\text{dm}=3\text{dm} \\ c=7.6\text{dm} \\ q=70\%=\frac{70}{100}=\frac{7}{10}=0.7 \\ V=a\cdot b\cdot c\cdot q=8.2\cdot 3\cdot 7.6\cdot 0.7=130.872\text{l} \end{gathered}$$

$h=c\cdot q=7.6\cdot 0.7=5.32\text{dm}$

$p=70=70\%$

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