Four hills A, B, C, and D are in a straight line. The elevations are 247.58m 236.33m, 314.31m, and 396.48m respectively. The distances of B, C, and D from A are 12.9km, 45km, and 60km respectively. Considering the effect of curvature and refraction of the earth. a.) Compute the height of equal towers on A and D to sight over C with a 3.84m clearance. b.) Compute the elevation of the line of sight at B with the installation of the equal heights of the tower at A and D. c.) Compute the height of the tower at A with the clearance of 3.77m at C so that D will be visible from A if the height of the tower at D is 2.22m.
Four hills A, B, C, and D are in a straight line. The elevations are 247.58m 236.33m, 314.31m, and 396.48m respectively. The distances of B, C, and D from A are 12.9km, 45km, and 60km respectively. Considering the effect of curvature and refraction of the earth. a.) Compute the height of equal towers on A and D to sight over C with a 3.84m clearance. b.) Compute the elevation of the line of sight at B with the installation of the equal heights of the tower at A and D. c.) Compute the height of the tower at A with the clearance of 3.77m at C so that D will be visible from A if the height of the tower at D is 2.22m.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Four hills A, B, C, and D are in a straight line. The elevations are 247.58m 236.33m, 314.31m, and 396.48m respectively. The distances of B, C, and D from A are 12.9km, 45km, and 60km respectively. Considering the effect of curvature and refraction of the earth.
a.) Compute the height of equal towers on A and D to sight over C with a 3.84m clearance.
b.) Compute the elevation of the line of sight at B with the installation of the equal heights of the tower at A and D.
c.) Compute the height of the tower at A with the clearance of 3.77m at C so that D will be visible from A if the height of the tower at D is 2.22m.
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