Home
Class 12
MATHS
An observer on the top of a tree ,finds ...

An observer on the top of a tree ,finds the angle of depression of a car moving towards the tree to be `30^@` .After 3 minutes this angle becomes `60 ^@`.After how much more time , the car will reach the tree ?

A

4 min

B

`4.5 min`

C

`1.5 min`

D

`2 min`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION-PAPERS-2016

    BITSAT GUIDE|Exercise MATHEMATICS|45 Videos
  • QUESTION-PAPERS-2018

    BITSAT GUIDE|Exercise MATHEMATICS|45 Videos

Similar Questions

Explore conceptually related problems

From a boat, which is moving towards a bridge, the angle of elevation of bridge is 30^(@) . After 10 minutes, the angle of elevation becomes 60^(@) . Find how much more time will take the boat to reach at the bridge?

A man from the top of a 100 metres high tower sees a car moving towards the tower at an angle of depression of 30^@ . After some time, the angle of depression becomes 60^@ .The distance (in metres) travelled by the car during this time is

A man on a cliff observes a boat at an angle of depression 30^(@) which is sailing towards the shore to the point immediately beneath him. Three minutes later the angle of depression of the boat is found to be 60^(@) . Assuming that the boat sails at a uniform speed, determine how much more time it will take to reach the shore.

A man from the top of a 100 metres high tower observes a car moving towards the tower at an angle of depression of 30^(@) . After some time, the angle of depression becomes 60^(@) . The distance (in metres) travelled by the car during this time is

A man standing in the balcony of a multi-storeyed observes a car at an angle of depression alphawhere tan alpha =1/sqrt(5). This car is moving towards the base of the building.Ten minutes later the angle of depression of the car is found to be beta where tan beta=sqrt(5). If the car is moving at a uniform speed, determine how much more time will it take to reach the base of the building.

A man from the top of a 100 m high tower sees a car moving towards the tower at an angle of depression 30°. After some time, the angle of depression becomes 60°. What is the distance travelled by the car during this time ?

BITSAT GUIDE-QUESTION-PAPERS-2017-MATHEMATICS
  1. The marks obtained by 60 students in a certain test are given below : ...

    Text Solution

    |

  2. Given that e^(iA) , e^(iB) , e^(iC) are in A.P., where A, B, C are a...

    Text Solution

    |

  3. An observer on the top of a tree ,finds the angle of depression of a c...

    Text Solution

    |

  4. After striking a floor a certain ball rebounds (4/5)^(t h) of the heig...

    Text Solution

    |

  5. An equilateral triangle is inscribed in the circle x^2+y^2=a^2 with o...

    Text Solution

    |

  6. The function f (x) = x - |x - x ^(2) | , -1 le x le 1 is continuous on...

    Text Solution

    |

  7. If 4^n/(n+1) lt ((2n)!)/((n!)^2), then P(n) is true for

    Text Solution

    |

  8. If a system of equation – ax + y + z = 0 x -by + z =0 x + y - cz = 0...

    Text Solution

    |

  9. If f (x) = x ^(x) , then f (x) is increasing in interval :

    Text Solution

    |

  10. If x is real number, then ( x )/( x ^(2) - 5 x +9 ) must lies between

    Text Solution

    |

  11. Evaluate: lim(x->oo) { ((a1)^(1/x)+(a2)^(1/x)+.... +(an)^(1/x))/n}^(n...

    Text Solution

    |

  12. The value of cot ^(-1) 7 + cot ^(-1) 8 + cot ^(-1) 18 is

    Text Solution

    |

  13. If int "" (cos x - 1)/( sin x +1 ) e ^(x) dx is equal to :

    Text Solution

    |

  14. A random variable X has the probability distribution For the eve...

    Text Solution

    |

  15. The number of roots of equation cos x + cos 2x + cos 3x = 0 is ( 0 le ...

    Text Solution

    |

  16. The area under the curve y = | cos x - sin x |, 0 le c le (pi)/(2), an...

    Text Solution

    |

  17. If f (x) = {{:(( x log cos x )/( log (1 + x ^(2)))",", x ne 0), ( 0","...

    Text Solution

    |

  18. The maximum value of z = 3x + 2y subject to x + 2y ge 2 , x + 2y lt 8...

    Text Solution

    |

  19. A cylindrical gas container is closed at the top and open at the ...

    Text Solution

    |

  20. Let A, B , C be finite sets. Suppose that n (A) = 10, n (B) = 15, n (C...

    Text Solution

    |