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A man is walking towards a vertical pill...

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

A

`10`

B

`20`

C

`5`

D

`6`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-HEIGHTS AND DISTANCES-LECTURE SHEET Exercise-I (Straight Objective Type Questions)
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  10. A flag staff of 5 mts high stands on a building of 25 mt high. At an o...

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  11. There are two stations P,Q due north, due south of a tower of height 1...

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  14. A bird is sitting on the top of a vertical pole 20 m high and its elev...

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  15. A tower stands at the center of a circular park. A and B are two point...

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  16. A lamp post is sittuated at the middle point M of the side AC of a tri...

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  17. The angle of elevation of a top of a tower from a point A due south of...

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  19. The angle of elevation of the top of the top of a vertical tower from...

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