Surveying
The equation which is obtained by multiplying each equation by the coefficient of its unknowns and by adding the equations thus formed, is known as

Conditional equation
Observation equation
None of these
Normal equation

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Surveying
In triangulation surveys

All listed here
The area is divided into triangular figures
Sides are not measured excepting the base line
Control stations are located from which detailed surveys are carried out

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Surveying
For a line AB

the forebearing of AB and back bearing of AB differ by 180°
the forebearing of AB and back bearing of BA differ by 180°
none is correct
both (A) and (B) are correct

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