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there are 240 bricks used ro build a wall that is 20 feet high. how many bricks will be used for a 1 foot high wall

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This problem could be solve with the Simple of Three Rule:


\begin{gathered} 20\text{ f}eet\to240\text{ bricks} \\ 1\text{foot }\to x\text{ bricks} \\ x=1foot\cdot\frac{240\text{ bricks}}{20\text{ f}eet}=(240)/(20)bricks=12\text{ bricks} \end{gathered}

You need 12 bricks for a 1 foot high wall

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