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    4. how do i calculate the amount of water collected from a roof on a rainy day
    how do i calculate the amount of water collected from a roof on a rainy day

    rain fall amount is 72mm roof plan is k10m + 5m + 5m + 4m +9m

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    0  Views: 468 Answers: 2 Posted: 13 years ago
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      2 Answers

      why not just purchase a rain gauge and place under the downpipe

      13 years ago. Rating: 0
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        Simplest way is to put a barrell of known capacity under the downpipe. Otherwise you could multiply the area of the roof by the rainfall which you could find by using a rain gauge .

        13 years ago. Rating: 0
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