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A 1.5m tall boy is standing at some distance from a 30m tall building. The angle of elevation from his eyes to the top of the building increases from `30o` to `60o` as he walks towards the building. Find the distance he walked towards the building.

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Verified by Experts

The correct Answer is:
`19sqrt(3)m`
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VK GLOBAL PUBLICATION-HEIGHT AND DISTANCE-SHORT ANSWER QUESTIONS II
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