The error due to curvature in levelling operations is = ....................Where D' is the length of sight in kilometers
A0.0113 D^2 meter
B0.0673 D^2 meter
C0.0785 D^2 meter
DNone of these
A0.0113 D^2 meter
B0.0673 D^2 meter
C0.0785 D^2 meter
DNone of these