In trigonometric levelling, if the horizontal distance between the instrument and the object is 3088 m, the coefficient of refraction is 0.07 and R sin 1" = 30.88 m, then the refraction correction in angular measure would be« Back to Previous Page
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A. 0.07"
B. 0.70"
C. 7.0"
D. 1'10"
 Posted by Civil EngineerAsked on September 13, 2016 12:57 pm
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