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 th

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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ur 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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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.

AV
247, Sem
3916.487
236.33m
314.31m
12.9 km
45km
6okm
Transcribed Image Text:AV 247, Sem 3916.487 236.33m 314.31m 12.9 km 45km 6okm
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