An observer 1.5 m tall stands 28.5 m from a chimney with an elevation of 45 degrees. The chimney is:

1. At 45 degrees, height above the eye equals the distance, 28.5 m. 2. Add the observer's own height of 1.5 m. 3. So the chimney is 30 m tall. _Source: syllabus Mathematics Class X, Chapter 9, Some Applications of Trigonometry._