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  1.  

    Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than
    2. A.

    30 m
    B.

    25 m
    C.

    20 m
    D.

    15 m

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    Workspace

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    Answer : Option B

    Explanation :

    No answer description available for this question. 

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