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If the R L of a B M is 100 00...

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Surveying
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If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

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Correct Answer: Option A
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4 Comments
Riju Chakraborty
Riju Chakraborty 3 months ago
Using the Height of Instrument (H.I.) method:

R.L. of B.M. = 100.000 m

Back sight (B.S.) = 1.215 m
H.I. = 100.000 + 1.215 = 101.215
Foresight (F.S.) = 1.870 m
R.L. of forward station = H.I. - F.S.
=101.215-1.870=99.345m
Sushmitha Km
Sushmitha Km 6 years ago
In case force sight is not given, how to calculate RL of forward station?
Amalzad Khan
Amalzad Khan 6 years ago
RL + back side = Hi- foresight
100.00+1.215 =101.215-1.879 =99.345
TEJA CRAZY
TEJA CRAZY 6 years ago
explain
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