71. The formule for correction of curvature in meters.
72. The fore bearing of a line is S 45° 45' E then back bearing will be . . . . . . . .
73. The most commonly used datum is the . . . . . . . .
74. The area of triangle whose sides are 30m, 40m and 50m is . . . . . . . .
75. Satellite orbits are inclined at an angle of 550 from . . . . . . . .
76. For checking closed traverse the algebric sum of all departures should be equal to
77. The magnetic bearing of a line is 100 declination is 2°, the true bearing of line is . . . . . . . .
78. The priliminary inspection done to understand the features of the area to be surveyed is called . . . . . . . .
79. The local attraction at a station X is 1°E. The bearings of two lines XY and XZ are 45° and 330° respectively. The angle ZXY is . . . . . . . .
80. The number of types of Bench Marks are . . . . . . . .
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