Mohit is standing at some distance from a 60 meters tall building. Mohit is 1.8 meters tall. When Mohit walks towards the building, then the angle of elevation from his head becomes 60° from 45°. How much distance (in metres) Mohit covered towards the building?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 19.4(3 − √3)
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Application |
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Suppose ‘x’ is the distance covered by Mohit towards the building. So, Tan45° = 58.2/(x + y) ⇒ (x + y) = 58.2 And Tan60° = 58.2/y ⇒ √3 = 58.2/y ⇒ y = 19.4√3 Hence, x = 58.2 – 19.4√3 = 19.4(3 − √3) |
