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GATE 2021 AG – Question 43

Soil and Water Conservation Engineering · Surveying and Leveling · 2 marks · Multiple choice

A closed traverse ABCDA′ has observed departures and latitudes as shown. A′ differs from start A. Find closing error in m.

Diagram for GATE 2021 AG question 43
  1. 6.33
  2. 7.62
  3. 33.73
  4. 35.21

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Correct answer: (B) 7.62

Explanation

Following the arrows:net departure=9+6−10−8=−3 m;net latitude=2−12−7+10=−7 m. Closing error is $\sqrt{(-3)^2+(-7)^2}=\sqrt{58}=7.61577$ m, or **7.62,B**. Absolute lengths must retain their east/west and north/south signs.

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