To find the true difference between points A and B on the opposite banks of a river, the level was set up near A and the staff readings on A and B were 2.635 and 4.247. The level was then moved and set up near B and the respective staff readings on A and B were 2.020 and 3.980. What is the true RL of B if RL of A is 400?
A. 405.464 m
B. 403.571 m
C. 401.782 m
D. 398.214 m
Answer:D
To find the true difference between points A and B on the opposite banks of a river, the level was set up near A and the staff readings on A and B were 2.635 and 4.247. The level was then moved and set up near B and the respective staff readings on A and B were 2.020 and 3.980. What is the true RL of B if RL of A is 400?
A. 405.464 m B. 403.571 m C. 401.782 m D. 398.214 m