Question
Download Solution PDFIf the height of the building and the distance from the foot of the building to a point is increased by 20%, then the angle of elevation at the top of the building is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven
The height of the building and distance from the building foot’s to a point is increased by 20%
Concept
Height and distance
Calculation
Let the angle before increase be A°.
Height = h and distance = x.
Tan A = h/x
Let the angle after the increase be B°.
After the height and distance is increased:
h = 120/100 × h = 6/5h
x = 120/100 × x = 6/5x
Tan B° = (6/5h)/(6/5x) = h/x
Tan B° = Tan A°
Hence, the angle remains the same and do not change.
Last updated on Jan 29, 2025
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