A wall $24$ m long , $0.4 m$ thick and $6$ m high is constructed with the bricks each of the dimentions $25$ cm x $16$ cm. If the meter occupies of the volume of the wall , then find the number of brickes used in constructing the wall

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Solution

Wall $= 24 m$ long, $0.4 m$ thick and $6 m$ high
Bricks dimension $= 25 c m$ and $16 c m$ & $10 c m$
Volume of wall $= 24 \times 0.4 \times 6$
$= 576 m^{2}$
Volume of brick $= 0.25 \times 0.16 \times 0.1$
$= 0.004 m^{2}$
Number of bricks $= \frac{v o l u m e o f w a l l}{v o l u m e o f b r i c k}$
$= \frac{57.6}{0.004} \times \frac{1000}{10}$
$= 14400$

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