Point A is between points B and C. The distances of B and C from point A are 1000 m and 2000 m, respectively. Measured from point A, the angle of elevation of point B is 18deg30’, while that of point C is unknown. The difference in the elevations of B and C is 44.4 m, with C being lower than B. Considering the effects of curvature and refraction, the value of unknown angle is nearest to:
Point A is between points B and C. The distances of B and C from point A are 1000 m and 2000 m, respectively. Measured from point A, the angle of elevation of point B is 18deg30’, while that of point C is unknown. The difference in the elevations of B and C is 44.4 m, with C being lower than B. Considering the effects of curvature and refraction, the value of unknown angle is nearest to:
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Point A is between points B and C. The distances of B and C from point A are 1000 m and 2000 m, respectively. Measured from point A, the angle of elevation of point B is 18deg30’, while that of point C is unknown. The difference in the elevations of B and C is 44.4 m, with C being lower than B. Considering the effects of curvature and refraction, the value of unknown angle is nearest to:
Transcribed Image Text:Point A is between points B and C. The distances of B and C from point A are
1000 m and 2000 m, respectively. Measured from point A, the angle of elevation
of point B is 18deg30', while that of point C is unknown. The difference in the
elevations of B and C is 44.4 m, with C being lower than B. Considering the
effects of curvature and refraction, the value of unknown angle is nearest to:
6deg45
5deg20'
8deg15'
O 7deg30'
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