Home
Class 10
MATHS
Two boats approach a light house in mid-...

Two boats approach a light house in mid-sea from opposite directions. The angles of elevation of the top of the light house from two boats are `30^0a n d45^0` respectively. If the distance between two boats is 100m, find the height of the light house.

Text Solution

AI Generated Solution

To solve the problem step by step, we will use trigonometric ratios to find the height of the lighthouse based on the angles of elevation from the two boats. ### Step 1: Define the Variables Let: - \( H \) = height of the lighthouse - \( x \) = distance from the first boat (where the angle of elevation is \( 45^\circ \)) to the base of the lighthouse - Therefore, the distance from the second boat (where the angle of elevation is \( 30^\circ \)) to the base of the lighthouse will be \( 100 - x \). ...
Promotional Banner

Topper's Solved these Questions

  • REAL NUMBERS

    RD SHARMA|Exercise All Questions|180 Videos
  • STATISTICS

    RD SHARMA|Exercise All Questions|230 Videos

Similar Questions

Explore conceptually related problems

The angles of depression from the top of a light house of two boats are 45^@ and 30^@ towards the west. If the two boats are 5m apart, then the heighat of the light house is

Two ships are sailing in the sea on the tow sides of a light house . The angles of elevation of the top of the light house as observed from the two ships are 30^(@)and45^(@) respectively . If the light house is 100 m high , the distance be - tween the two ships is :(take sqrt(3)=1.73)

The angles of depression of two ships from the top of a light house and on the same side of it are found to be 45o and 30o respectively.If the ships are 200m apart,find the height of the light house.

The angle of elevation of top of a house from top and bottom of tree are respectively x and y. If height of the tree is h meter then what is the height of the house ?

Two ships are sailing in the sea on the two sides of a lighthouse. The angles of elevation of the top of the lighthouse as observed from the two ships are 30o and 45o respectively. If the lighthouse is 100 m high, the distance between the two ships is (a) 173 m (b) 200 m (c) 273 m (d) 300 m

A house subtends a right angle at the window of an opposite house and the angle of elevation of the window for the bottom of the first house is 60^(@) If the distance between the two houses be 6m then the height of the first house is

Two men are on the opposite sides of a tower. They measure the angles of elevation of the top of the tower as 45^(@) and 30^(@) respectively. If the height of the tower is 40 m, then the distance between the men is

RD SHARMA-SOME APPLICATIONS OF TRIGONOMETRY-All Questions
  1. A man sitting at a height of 20m on a tall tree on a small island in ...

    Text Solution

    |

  2. The angle of elevation of a cloud from a point h metre above a lake is...

    Text Solution

    |

  3. Two boats approach a light house in mid-sea from opposite directions. ...

    Text Solution

    |

  4. A ladder rests against a vertical wall at inclination alpha to the hor...

    Text Solution

    |

  5. A ladder makes an angle of 60^0 with the ground when placed against a ...

    Text Solution

    |

  6. The length of shadow of a tower on the plane ground is sqrt(3) times t...

    Text Solution

    |

  7. The angle of elevation of the top of a tower at a point on the ground ...

    Text Solution

    |

  8. From a light house the angles of depression of two ships on opposite s...

    Text Solution

    |

  9. From a window 15 metres high above the ground in a street, the angles ...

    Text Solution

    |

  10. A man standing on the deck of a ship, which is 10m above water level. ...

    Text Solution

    |

  11. An aeroplane at an altitude of 200 metres observes the angles of de...

    Text Solution

    |

  12. The angle of elevation of the top of a vertical tower P Q from a ...

    Text Solution

    |

  13. A man on the top of a vertical tower observes a car moving at a unifor...

    Text Solution

    |

  14. The shadow of a flag-staff is three times as long as the shadow of the...

    Text Solution

    |

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

    Text Solution

    |

  16. Two stations due south of a leaning tower which leans towards the nort...

    Text Solution

    |

  17. From an aeroplane vertically above a straight horizontal road, the ...

    Text Solution

    |

  18. A ladder rests against a wall at an angle alpha to the horizontal. It...

    Text Solution

    |

  19. If the angle of elevation of a cloud from a point h metres above a lak...

    Text Solution

    |

  20. The horizontal distance between two towers is 140 mdot The angle of el...

    Text Solution

    |