The following consecutive readings were taken with a dumpy level along a chain line at a common interval of 15 m. 1.5, 2.5, 4.0, 2.0, 3.0, 5.5, 1.0, 6.0, and 3.0 m. The first reading was at a reduced level (RL) of 60.5 m. If you know that the fourth and sixth points are turning points. Find the RL of ...
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