For the following questions answer them individually
During leveling operations, if the back sight is more than the fore sight, then it indicates that
If bearing of line XY and XZ are $$26^\circ 10’ and 298^\circ 45’,$$ the value of sndluded’angle ZXYis
While measuring the distance between’ the ‘two points, if L is in kilometers, the correction for curvature of earth is
The vertical distance between the springing line and the highest point on the intrados is called ......... of the arch