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12 May, 12:52

A flagpole casts a shadow that is 23.5 feet long. At the same time of day, mrs gilbert who is 5.5 feet tall casts a shadow that is 7.5 feet long. How tall in feet is the flagpole?

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  1. 12 May, 13:11
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    Shadow of the flagpole=23.5f

    Sf=23.5

    shadow of gilbert=7.5f

    Sg=7.5

    height of gilbert=5.5f

    hg=5.5

    Sf/hf=Sg/hg

    23.5/hf=7.5/5.5

    23.5*5.5/7.5=hf

    (47/2*11/2) / 7.5=hf

    (517/4) / (30/4) = hf

    (517*4) / (4*30) = hf

    517/30=hf

    17+7/30=hf

    17.233 ... feet=height of flagpole
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