The pool

The pool is 25 meters long, 10 meters wide, and 1.5 meters deep. How many liters are needed to fill it completely? How much will the new floor and wall paneling cost if one m² costs 10 euros?

Correct answer:

V =  375000 l
x =  3550 eur

Step-by-step explanation:

$$\begin{gathered} a=25\text{m} \\ b=10\text{m} \\ c=1.5\text{m} \\ {V}_1=a\cdot b\cdot c=25\cdot 10\cdot 1.5=375{\text{m}}^3 \\ V=V_1\to \text{l}=V_1\cdot 1000\text{l}=375\cdot 1000\text{l}=375000\text{l}=375000\text{l} \end{gathered}$$

$$\begin{gathered} p=10{\text{eur/m}}^2 \\ S=a\cdot b+2\cdot (a+b)\cdot c=25\cdot 10+2\cdot (25+10)\cdot 1.5=355{\text{m}}^2 \\ x=p\cdot S=10\cdot 355=3550\text{eur} \end{gathered}$$

Try another example