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  1. 13th May 2012 06:28 am #1
    tck_17
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    Default Help on Penn Foster Civil Drafting

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    Hi..My question is about the computation of the interpolations..I was reading the other threads and the explanations are confusing..

    I believe car5858 followed the example #2.

    My question is with the sample from the project booklet.

    93.8-88.9=4.9
    50/49=1.0204081
    1.0204081 x 11= 11.22

    Where did "11" come from? I just don't quite understand.
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  2. 13th May 2012 09:14 pm #2
    ReMark
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    Having read and reread Car5858's explanation on how to interpolate contours I can find no fault. Wouldn't the "11" be the distance to the required spot elevation?
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