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Comparing Decimal Numbers

A levelling i...

Question

A levelling is carried out to establish the reduced level (RL) of point R with respect to the bench mark (BM) at P. The staff reading taken are given below

Staff Station BS IS FS RL

P 1.655 - - 100.000

Q -0.950 - -1.500 -

R - - 0.750 ?

If RL of P is +100 m then RL (m) of R is

A

101.455

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B

100.355

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C

103.355

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D

103.155

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Solution

The correct option is A 101.455
$R L o f Q = 100 + 1.655 - (- 1.500)$

$= 103.155$

$R L o f R = 103.155 + (- 0.950 - 0.750)$

$= 101.455$

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