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Two pillars are 120 ft a part and the he...

Two pillars are `120` ft a part and the height of one in double that of the other. From the middle point of the line joining their feet an observer finds that the angular elevations of their tops are complementary. The height of the longer tower is ……….. feet.

A

`35sqrt(2)`

B

`60sqrt(2)`

C

`50sqrt(2)`

D

`40sqrt(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-HEIGHTS AND DISTANCES-LECTURE SHEET Exercise-I (Straight Objective Type Questions)
  1. An obserever finds that the angular elevation of a tower is theta. On...

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  2. If a flag staff of 6 mt high placed on the top of a tower throws a sha...

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  3. Two pillars are 120 ft a part and the height of one in double that of ...

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  4. Two vertical poles 20m and 80m heigh stand apart on a horizontal plane...

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  5. If from the top of a tower of 60 metre heigh, the angles of depression...

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  6. From the top of a cliff x mts heigh, the angle of depression of the fo...

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  7. A ladder rests against wall at an angle alpha to the harizontal. Its f...

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  8. If the angles of elevation of the top of a tower from three collinear ...

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  9. A ballon is observed simultaneously from the 3 points A,B,C on a staig...

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  10. At the foot of the mountain the elevation of its summit is 45^(@) Afte...

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  11. ABCD is a trapezium such that AB and CD are parallel and BC bot CD. If...

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  12. The upper 3//4th portion of a vertical pole subteds pole subteds an an...

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  13. A tower MPQ surmounted by a spiral QR stands on a harzontal plane. At ...

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  14. On one side of a road of width 'd' meters there is a points of observa...

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  15. A flag staff of 5 mts high stands on a building of 25 mt high. At an o...

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

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  17. A tower leans towards west making an angle alpha with the vertical. Th...

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  18. A man is walking towards a vertical pillar in a straight path, at a un...

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

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

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