In levelling, the following staff readings were observed involving an inverted staff, a = 2.915 and b = -2.028. what is the rise or fall from a to b (only enter numeric answer, no alpha)?

The rise from A to B is 0.887

Solution:

As per the question:

The following reading of an inverted staff is given as:

A = 2.915

B = -2.028

Here, for inverted staff, the greater reading shows greater elevation and lesser reading shows lower elevation.

Thus

The rise from A to B is given as:

A - B = 2.915 - 2.028 = 0.887