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A man is walking towards a vertical pillar in a straight path, at a uniform speed. At a cetrain point A on the path, he observves that the angle of elevation of the top of the pillar is 30^(@). After walking for 10 minutes from A in the same direction, at a point B, he observes that the angle of elevation of the top of the pillar is 60^(@). Then the time taken (in minutes ) by him, from B to reach the pillar, is |
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Answer» 10 |
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