1.

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

Answer»

10
20
5
6

Answer :C


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