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Math Help - Quick direct variation problem

  1. #1
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    Quick direct variation problem

    The distance d to the visible horizon varies directly with the square root of the height h
    of the observer above sea level. An observer 1.8 m tall can see 4.8 km out to sea when
    standing on the shoreline.

    I know how to do it but the answers says I'm wrong...

    d \alpha \sqrt{h} <--- this is meant to be proportional sign but I can't seem to find it and alpha looks close enough xD

    so d=k*\sqrt{h}

     4.8=k*\sqrt{1.8}

    k=3.57771

    we found k then:

     d=k*\sqrt{4}

    d=3.57771 * 2

    but the answer is like 8. something

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  2. #2
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    Part of the question appears to be missing.
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