English

If the length of the shadow of a tower is sqrt(3) times its height then the angle of elevation of the sun is ______.

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Question

If the length of the shadow of a tower is `sqrt(3)` times its height then the angle of elevation of the sun is ______.

Options

  • 45°

  • 30°

  • 60°

  • 90°

MCQ
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Solution

If the length of the shadow of a tower is `sqrt(3)` times its height then the angle of elevation of the sun is 30°.

Explanation:

Let the tower’s height = h and shadow = `sqrt(3)·h`. 

Then `tan θ = "Height"/"Shadow"`

= `h/(sqrt(3)h)`

= `1/sqrt(3)`

= tan 30°

So θ = 30°.

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Chapter 14: Heights and Distances - MULTIPLE-CHOICE QUESTIONS (MCQ) [Page 671]

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R.S. Aggarwal Mathematics [English] Class 10
Chapter 14 Heights and Distances
MULTIPLE-CHOICE QUESTIONS (MCQ) | Q 3. | Page 671
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