Computer · Levelling and Curvature Correction
A level is set up at O on a line AB, 20 m from A and 1200 m from B. The combined correction for curvature and refraction to be applied for the 20 m distance is approximately:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.0269 m
- 20.269 m
- 30 m✓
- 40.00269 m
Correct answer
0 m
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