Staff readings on pegs x and y from X station are 1.755m and 2.850m, and from station Y and X are 0.655m and 1.560m. If reduced level of X is 105.5m, the reduced level of Y is:
GitBook practice — Set 5 (Ashoj, 2081)
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GitBook practice — Set 5 (Ashoj, 2081)