Bricks

How many bricks are needed for a wall 14.5 m long, 2 m high, and 45 cm thick, if 285 bricks are needed for one m³ wall?

Correct answer:

n =  3720

Step-by-step explanation:

$$\begin{gathered} a=14.5\text{ m } \\ b=2\text{ m } \\ c=45\text{ cm}\to \text{ m}=45\mathrm{/}100\text{ m}=0.45\text{ m } \\ V=a\cdot b\cdot c=14.5\cdot 2\cdot 0.45={\displaystyle \frac{261}{20}}=13\frac{1}{20}=13.05{\text{m}}^3 \\ n=\lceil V\cdot 285\rceil =\lceil 13.05\cdot 285\rceil =3720 \end{gathered}$$

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