Surveying - Engineering

Q1:

In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs)

A 50" n

B 30" n

C 60" n.

ANS:A - 50" n

30/6=5.
√n is constant.
So, 5√n