Home
Class 11
MATHS
AB is vertical pole with B at ground le...

AB is vertical pole with B at ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is `60^(@)`. He moves away from the pole along the line BC to a point D such that CD =7 m. From D the angle of elevation of the point A is `45^(@)` then the hight of the pole is

A

`(7sqrt3)/2(sqrt3+1)`

B

`(7sqrt3)/2(sqrt3-1)`

C

`(7sqrt3)/(2(sqrt3+1))`

D

`(7sqrt3)/(2(sqrt3-1))`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • HEIGHTS AND DISTANCES

    AAKASH SERIES|Exercise LECTURE SHEET Exercise-I (Straight Objective Type Questions)|27 Videos

  • HEIGHTS AND DISTANCES

    AAKASH SERIES|Exercise PRACTICE SHEET Exercise-I (Level-I) (Straight Objective Type Questions)|39 Videos

  • HEIGHTS AND DISTANCES

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE - II ) (LEVEL- I (MAIN) SINGLE ANSWER TYPE QUESTIONS)|20 Videos

  • FUNCTIONS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|50 Videos

  • HYPERBOLIC FUNCTIONS

    AAKASH SERIES|Exercise PRACTICE SHEET EXERCISE-II (STRAIGHT OBJECTIVE TYPE QUESTIONS)|18 Videos

Similar Questions

Explore conceptually related problems

AB is a vertical pole with B at the ground level and and A at the top .A man finds that the angle of elevation of the point A from a certain point C on the ground is 60^(@) . He moves away from the pole along the line BC to a point D such that CD = 7 m .From D . the angle of elevation of the point A is 45^(@) .Find the height of the pole .

When the angle of elevation of a pole is 45^(@) , the length of the pole and its shadow are

From a point 30 mts from the foot of a tower, the angle of elevation of the top is 30^@ . The height of the tower is………..

The angle of elevation of the top of a tower from a point of the ground which is 30 m away from the foot of a tower of heigh 10 sqrt 3 m is…………

The angle of elevation of an electric pole from a point A on the ground is 60^(@) and from a Point B towards the pole on the line joining the foot of the pole to the point A, is 75^(@) . If the distance AB = a, then the height of the pole is

The angle of elevation of the top of a tower from a point on the ground, which is 50 m away from the foot of the tower is 45^@ . Draw the diagram for the situation.

Angle of elevation of the top of a building from a point on the ground is 30^(@) , Then the angle of depression of this point from the top of the building is…………..

AAKASH SERIES-HEIGHTS AND DISTANCES-PRACTICE SHEET (EXERCISE HEIGHTS AND DISTANCES) (LEVEL- I (MAIN) SINGLE ANSWER TYPE QUESTIONS)
  1. A man standing on a level plane observes the anlge of elevation of top...

    Text Solution

    |

  2. AB is vertical pole with B at ground level and A at the top. A man fi...

    Text Solution

    |

  3. From a point on the level ground , the angel of elevation of the top ...

    Text Solution

    |

  4. The angle of elevation of an object from a point P on the level ground...

    Text Solution

    |

  5. The angles of elevation of a tower from two points which are at distan...

    Text Solution

    |

  6. At a certain point the angle of elevation of a tower is found to be co...

    Text Solution

    |

  7. The angle of elevation of the top of a tower standing on a harzontal p...

    Text Solution

    |

  8. A person stading on the bank of a river observerves that the angle of ...

    Text Solution

    |

  9. From the top of a hill h metre high, the angles of depressions of the ...

    Text Solution

    |

  10. A chimney leans towards north. At equal distance due north and south o...

    Text Solution

    |

  11. A tower subtends angles alpha,2 alpha, 3 alpha respectively at points ...

    Text Solution

    |

  12. A vertical tower stands on a declivity which is inclinde at 15^(@) to ...

    Text Solution

    |

  13. In a prison wall there is a window of 1 metre height, 14 metres from t...

    Text Solution

    |

  14. A flag-staff stands on a tower which is on level ground. The total hei...

    Text Solution

    |

  15. A tower stands at the top a hill whose height is three times the heigh...

    Text Solution

    |

  16. A vertical pole more than 100 ft high consists of two portions the low...

    Text Solution

    |

  17. A straight pole A subtends a right angle at a point B of another pole ...

    Text Solution

    |

  18. A tower, of x metres high, has a flagstaff at its top. The tower and t...

    Text Solution

    |

  19. From the top of a chiff 30 metres high, the angle of elevation of the ...

    Text Solution

    |

  20. From a point E on the horizontal due to east of a tree, the top of the...

    Text Solution

    |