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<math>A_{r}=\frac{D(i - f')\times A_{c}}{d_{r} \times n}</math>
<math>A_{r}=\frac{D(i - f')\times A_{c}}{d_{r} \times n}</math>
<br>
<br>
Where A<sub>c</sub> = A<sub>i</sub> + A<sub>p</sub>
<br>
Where <br>
<br>
A<sub>c</sub> = A<sub>i</sub> + A<sub>p</sub>


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Back to [[Permeable pavements]]
[[Category:Calculations]]
[[Category:Calculations]]

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