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A person walking along a straight road observes that a two points 1 km apart, the angles of eleva-tion of a pole in front of him are `30^@ and 75^@`. The height of the pole is

A

`250 (sqrt(3) + 1)` m

B

`250 (sqrt(3) - 1)` m

C

`500 (sqrt(2) + 1)` m

D

`500 (sqrt(2) - 1)` m

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The correct Answer is:
A
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MCGROW HILL PUBLICATION-HEIGHTS AND DISTANCES -EXERCISE (LEVEL-1 ( SINGLE CORRECT ANSWER TYPE QUESTIONS ))
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  2. A tower subtends an angle alpha at a point A in the plane of its base ...

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  3. A person walking along a straight road observes that a two points 1 km...

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  4. If a flagstaff subtends the same angle at the points A, B, C and D on ...

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  5. From a point on the ground 100 m away from the base of a building, the...

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  6. From the top of a tower 100 m heigh, the angles of depression of two o...

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  7. An observer finds that the angular elevation of a tower is theta. On a...

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  8. ABC is a triangular park with all sides equal. If a pillar at A subten...

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  9. A kite is flying with the string inclined at 75^(@) to the horizon. If...

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  10. AB is a vertical pole. The end A is on the level ground .C is the midd...

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  11. A man in a boat rowed away from a cliff 150 m high takes 2 min, to cha...

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  12. A person standing on the bank of a river observes that the angle subte...

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  13. The elevation of the top of a mountain at each of the three angular po...

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  14. The angles of elevation of the top of a tower standing on a horizontal...

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  15. The upper three-quarters of a vertical pole subtends an angle tan^(-1)...

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  16. PQ is a vertical tower and A, B, C are three points on a horizontal li...

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  17. ABCD is a rectangular park with AB = a. A tower standing at C makes an...

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  18. Two circular path of radii a and b intersect at a point O and AB is a ...

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  19. Three poles of height a, b, c stand on the same side of a road and sub...

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  20. An aeroplane flying horizontally 1 km above the ground is observed at ...

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