# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 7 (Q.No. 21)

21.

Staff readings on pegs

*x*and*y*from*X*station are 1.755 m and 2.850 m, and from station*Y*on staff head at*Y*and*X*are 0.655 m and 1.560 m. If reduced level of*X*is 105.5 m, the reduced level of*Y*isDiscussion:

7 comments Page 1 of 1.
Srikanth said:
4 years ago

RL of Y = RL of X + back sight of Y - foresight of Y.

105.5+0.655 - 1.560 = 104.595.

105.5+0.655 - 1.560 = 104.595.

(2)

Vikesh said:
4 years ago

RL of point x + backsight x = height of instrument (105.5 + 1.755 = 107.255).

RL of y = height of instrument - fore sight of y (107.255 - 2.850 = 104.405).

RL of y = height of instrument - fore sight of y (107.255 - 2.850 = 104.405).

(5)

Pratik said:
6 years ago

By using the formula of reciprocal levelling find the value of h and then we know then.

RL of pt B = RL of pt A - h.

RL of pt B = RL of pt A - h.

(1)

Anom said:
7 years ago

Subtract the difference of reading either staff x or y with 105.5.

(1)

Dhyey said:
8 years ago

=105.5-(((2.85-1.755) + (1.56-0.655))/2).

=104.5.

=104.5.

(2)

Shilpa sahu said:
9 years ago

Rl - ib = 105.5-(1.56 - 0.655).

(2)

Dhanu said:
9 years ago

How can solve this problem help me?

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