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A level instrument at a height of $1.320$ m has been placed at a station having a Reduced Level (RL) of $112.565$ m. The instrument reads $-2.835$ m on a levelling staff held at the bottom of a bridge deck. The RL (in m) of the bottom of the bridge deck is

  1. $116.720$
  2. $116.080$
  3. $114.080$
  4. $111.050$
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