Pool wetted area

The block-shaped pool with dimensions of 25 m and 12.5 m and a depth of 2 m is filled with 4/5 of water. Calculate the area of water-wetted areas.

Final Answer:

S =  432.5 m²

Step-by-step explanation:

$$\begin{gathered} a=25\text{m} \\ b=12.5\text{m} \\ c=2\text{m} \\ {c}_2=\frac{4}{5}\cdot c=\frac{4}{5}\cdot 2=\frac{4\cdot 2}{5}=\frac{8}{5}=1.6\text{m} \\ S=a\cdot b+2\cdot (a+b)\cdot c_2=25\cdot 12.5+2\cdot (25+12.5)\cdot 1.6=\frac{865}{2}{\text{m}}^2=432.5{\text{m}}^2 \end{gathered}$$

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