Surveying
The time interval between successive transits of the moon, is

20 hours 25 minutes
23 hours 50 minutes
24 hours 10 minutes
24 hours 50 minutes

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Surveying
The necessary geometrical condition for triangulation adjustment is:

The sum of the eight angles of a braced quadrilateral should be 360°
The sum of the three angles of a plane triangle should be 180°
The sum of the angles around a station should be 360°
All listed here

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