Pool coating

How many tiles 25 cm × 15 cm need to coat the bottom and sidewalls of the pool with bottom dimensions 30 m × 5 m if the pool can fit up to 271500 liters of water?

Correct answer:

n =  7379

Step-by-step explanation:

$$\begin{gathered} V=abc \\ c=\frac{V}{ab}=\frac{271.5m^3}{30\cdot 5}=1.81m \\ {S}_1=25\cdot 15/100/100=0.0375m^2 \\ S=30\cdot 5+2\cdot 1.81\cdot 30+2\cdot 1.81\cdot 5=276.7m^2 \\ n=S/S_1=276.7/0.0375=7379 \end{gathered}$$

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