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Ritu Nagar • 4.39K Points
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Q. A method of differential levelling is used in order to find the difference in elevation between two points when ?

(A) they are too far apart
(B) there are obstacles between them
(C) the difference in elevation between them is too great
(D) all of the above
  • Correct Answer - Option(D)
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  • Filed under category Surveying
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