![A staff is placed on a benchmark (BM) of reduced level (RL) 100.000 m and a theodolite is placed at a horizontal distance of 50 m from the BM to measure the vertical angles](https://www.gkseries.com/blog/wp-content/uploads/thumbs_dir/A-staff-is-placed-on-a-benchmark-BM-of-reduced-level-RL-100.000-m-and-a-theodolite-is-placed-at-a-horizontal-distance-of-50-m-from-the-BM-to-measure-the-vertical-angles-qa4eluklrxski7crphtwzj8t3vcv5q531znaymgzvk.jpg)
Q. A staff is placed on a benchmark (BM) of reduced level (RL) 100.000 m and a theodolite is placed at a horizontal distance of 50 m from the BM to measure the vertical angles. The measured vertical angles from the horizontal at the staff readings of 0.400 m and 2.400 m are found to be the same. ...
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