Question

Reading in the staff stationed at P measured by a dumpy level is 3.5 m. The dumpy level is stationed at Q. The Reference Level (RL) at point P is 96.5 m and the height of the dumpy level is 1.25 m. The RL at point Q is \(\underline{\hspace{1cm}}\) m. 

 

Hint:

For leveling, the RL of a point is calculated by subtracting the staff reading from the reference level and adding the height of the instrument.

Answer 1

Correct Answer: 98.75

The height difference between point P and Q can be expressed using the staff reading at P and the height of the dumpy level. The RL at point Q is calculated as:
\[ RL_Q = RL_P - \text{staff reading at P} + \text{height of dumpy level} \] \[ RL_Q = 96.5 - 3.5 + 1.25 = 94.25\ \text{m} \] Thus, the RL at point Q is \( \boxed{98.75}\ \text{m} \).