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To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station Q?

To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station Q?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station Q?
Transcribed Image Text:To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station Q?
To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station P?
Transcribed Image Text:To find the elevation of the top of a chimney, the following observations were made from two stations P and Q, 50 m apart. Horizontal angle at station P, between chimney and Q = 60°. Horizontal angle at station Q, between chimney and P =50°. Angle of elevation from P to the top of chimney =30°. Angle of elevation from Q to the top of chimney =29°. Elevation of the line of sight at P=22.5 m. and elevation of the line of sight at Q = 20.5 m. What is the elevation of the top of the chimney from observations at station P?
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