The 10 mm markings on a levelling staff placed at 20 m are separated b – McqOptions

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1.	The 10 mm markings on a levelling staff placed at 20 m are separated by
A.	1/1000 radian
B.	1/1500 radian
C.	1/2000 radian
D.	1/2500 radian.
Answer» D. 1/2500 radian.

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