Home
Class 12
MATHS
An object is observed from three points ...

An object is observed from three points A, B, C in the same horizontal line passing through the base of the object. The angle of elevation at B is twice and at C thrice that at A. If `AB=a, BC=b` prove that the height of the object is `a/(2b)sqrt((a+b)(3b-a))`

A

`a/(2b)sqrt((a+b)(3b-a))`

B

`a/(2b)sqrt((a-b)(3b-a))`

C

`a/(2b)sqrt((a-b)(3b+a))`

D

`a/(2b)sqrt((a+b)(3b+a))`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • GGSIPU MATHEMATICS 2010

    IPUCET PREVIOUS YEAR PAPERS|Exercise MCQs|47 Videos

  • GGSIPU MATHMATICS 2011

    IPUCET PREVIOUS YEAR PAPERS|Exercise MCQ|46 Videos

Similar Questions

Explore conceptually related problems

An object is observed from three points A, B,C in the same horizontal line passing through the base of the object. The angle of elevation at B is twice and at C is thrice than that at A. If AB=a, BC=b prove that the height of the object is h=(a/(2b))sqrt((a+b)(3b-a))

The angle of elevation of an object on a hill is observed from a certain point in the horizontal plane through its base, to be 30^(@) . After walking 120 m towards it on a level groud, the angle of elevation is found to be 60^(@) . Then the height of the object (in metres) is

A balloon is observed simultaneously from three points A,B and C on a straight road directly under it.The angular elevation at B is twice and at C is thrice that at A .If the distance between A and B is 200metres and the distance between B and C is 100metres, then find the height of balloon above the road.

The angle of elevation of the top of a T.V. tower from three points A,B,C in a straight line in the horizontal plane through the foot of the tower are alpha, 2alpha, 3alpha respectively. If AB=a, the height of the tower is

PQ is a vertical tower having P as the foot. A,B,C are three points in the horizontal plane through P. The angles of elevation of Q from A,B,C are equal and each is equal to theta . The sides of the triangle ABC are a,b,c, and area of the triangle ABC is . Then prove that the height of the tower is (abc) tantheta/(4)dot

IPUCET PREVIOUS YEAR PAPERS-GGSIPU MATHEMATICS 2014-MCQs
  1. The solution of the differential equation x^(2)-y^(2)dx+2xydy=0, is

    Text Solution

    |

  2. The solution of the differential equation (d^(2)y)/(dx^(2))+3y=-2x is

    Text Solution

    |

  3. Angles A, B, C of a deltaABC are in AP and b : c = sqrt3 : sqrt2, th...

    Text Solution

    |

  4. The angle between the vectors a=hati+2hatj+2hatkandb=hati-2hatj+2hatk ...

    Text Solution

    |

  5. The straight line r=hati-hatj+hatk+lamda(2hati+hatj-hatk) are

    Text Solution

    |

  6. If two cards are drawn simultaneously from the same set, then probabil...

    Text Solution

    |

  7. In a class, there are 10 boys and 8 girls. When 3 students are selecte...

    Text Solution

    |

  8. If M and N are any two events, the probability that exactly one of the...

    Text Solution

    |

  9. If three square are chosen at random on a chess Board, show that chanc...

    Text Solution

    |

  10. if A=[{:(3,1),(-1,2):}],show that A^(2)-5A+7I=0.

    Text Solution

    |

  11. int0^1(dx)/(1+x+x^2)

    Text Solution

    |

  12. A market researchgroup conducted a survey of 1000 consumers and report...

    Text Solution

    |

  13. Find the equation of the plane through the points (2,2,1) and (9,3,6) ...

    Text Solution

    |

  14. Find the regression coefficient b(yx) and b(xy) and the two lines of r...

    Text Solution

    |

  15. The measure of the chord intercepted by circle x^2 + y^2 = 9 and the l...

    Text Solution

    |

  16. Find the value of tan^(-1) sqrt3 - cot^(-1) -sqrt3

    Text Solution

    |

  17. Show that the sum of deviations of the values of the variable from the...

    Text Solution

    |

  18. If a single letter is selected at random from the word 'PROBABILITY', ...

    Text Solution

    |

  19. An object is observed from three points A, B, C in the same horizontal...

    Text Solution

    |

  20. The angle between the lines whose direction ratios are 1,1,2,sqrt3-1,-...

    Text Solution

    |