Keeping the instrument height as 1.5 m, length of staff 4 m, the slope – McqOptions

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1.	Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than
A.	30 m
B.	25 m
C.	20 m
D.	15 m
Answer» C. 20 m

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