Surveying
The rise and fall method of levelling provides a complete check on

All of these
backsight
foresight
intermediate sight

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Surveying
Pick up the incorrect statement from the following. In a spherical triangle

Sum of any two sides is greater than the third
Sum of the three angles is equal to two right angles
Sum of the three angles less than six right angles and greater than two right angles
Every angle is less than two right angles

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Surveying
Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

All of these
By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
By subtracting their longitudes if places are in the same hemisphere
By adding their longitudes if places are in the different hemispheres

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