A man is walking towards a vertical pillar in a straight path, at a uniform speed. At a certain point A on the path, he

### Question Asked by a Student from EXXAMM.com Team

Q 3010012819.     A man is walking towards a vertical pillar in a straight path, at a uniform speed. At a certain point A on the path, he observes that the angle of elevation of the top of the pillar is 30 ^{ \circ }. 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 ^{ \circ }. Then the time taken (in minutes) by him, from B to reach the pillar is:
A

6

B

10

C

20

D

5

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