Pool tiles

The pool is 25m long, 10m wide and 160cm deep. How many m² of tiles will be needed on the walls and the pool? How many pieces of tile are needed when 1 tile has a square shape with a 20cm side? How much does it cost when 1m2 of tiles costs 258 Kc?

Correct result:

x =  9050
y =  93396 Kc

Solution:

$$\begin{gathered} a=25\text{ m } \\ b=10\text{ m } \\ c=160\mathrm{/}100={\displaystyle \frac{8}{5}}=1.6\text{ m } \\ S=a\cdot b+c\cdot 2\cdot (a+b)=25\cdot 10+1.6\cdot 2\cdot (25+10)=362{\text{m}}^2 \\ d=20\mathrm{/}100={\displaystyle \frac{1}{5}}=0.2\text{ m } \\ {S}_1=d^2=0.2^2={\displaystyle \frac{1}{25}}=0.04{\text{m}}^2 \\ x=S\mathrm{/}{S}_1=362\mathrm{/}0.04=9050 \end{gathered}$$

$y=S\cdot 258=362\cdot 258=93396\text{ Kc}$

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