The error in the staff readings due to curvature of the earth when the length of sight is 1 Km is
A. -0.0785 m
B. +0.0785 m
C. -0.0667 m
D. +0.0667 m
Answer:A
The error in the staff readings due to curvature of the earth when the length of sight is 1 Km is
A. -0.0785 m B. +0.0785 m C. -0.0667 m D. +0.0667 m