An observer 2.25 m tall is 42.75 m away from a chimney. The angle of elevation of the top of the chimney from her eyes is 45∘. What is the height of the chimney?
The given situation is represented by the figure above
But EB = DC
Height of chimney = AC = AB + BC
But BC = ED ∴ AC = AB + ED = 42.75 + 2.25 = 45m