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. Taking the height of the instrument as 1.400 m, the RL (in m) of the theodolite station is 100

A staff is placed on a benchmark (BM) of reduced level (RL) 100.000 m

1.	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. Taking the height of the instrument as 1.400 m, the RL (in m) of the theodolite station is 100
Answer» 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. Taking the height of the instrument as $1.400 m$ , the RL (in $m$ ) of the theodolite station is 100