During levelling operations, if the back sight is more than the fore sight, then it indicates that
1
The forward staff is at lower point
2
The back staff is lower point
3
The difference in level cannot be ascertained
4
None of the above
During levelling operations, if the back sight is more than the fore sight, then it indicates that
The forward staff is at lower point
The back staff is lower point
The difference in level cannot be ascertained