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 tiles are needed when one tile has a square shape with a 20cm side? How much does it cost when 1m² of tiles costs 258 Kc?

Correct answer:

x =  9050
y =  93396 Kc

Step-by-step explanation:

$$\begin{gathered} a=25\text{m} \\ b=10\text{m} \\ c=160/100=\frac{8}{5}=1\frac{3}{5}=1.6\text{m} \\ S=a\cdot b+c\cdot 2\cdot (a+b)=25\cdot 10+1.6\cdot 2\cdot (25+10)=362{\text{m}}^2 \\ d=20/100=\frac{1}{5}=0.2\text{m} \\ {S}_1=d^2=0.2^2=\frac{1}{25}=0.04{\text{m}}^2 \\ x=S/S_1=362/0.04=9050 \end{gathered}$$

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

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