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  1. The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is

    2. A.

    28.8 secs
    B.

    41.25 secs
    C.

    14.52 secs
    D.

    25.05
    E.

    none of these

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    Answer : Option B

    Explanation :

    No answer description available for this question

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