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A 1.5m tall boy is standing at some d...

A 1.5m tall boy is standing at some distance from a 30m tall building. The angle of elevation from his eyes to the top of the building increases from `30o` to `60o` as he walks towards the building. Find the distance he walked towards the building.

Text Solution

Verified by Experts

The correct Answer is:
`17.32 m`
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9.A boy 1.7m tall is standing on a horizontal ground, 50m away from a building. The angle of elevation of the top of the building from his eye is 60^(@) .Calculate the height of the building.(Take sqrt(3)=1.73 ).

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Knowledge Check

  • From two points A and B on the same side of a building the angles of elevation of the top of the building are 30^(@) and 60^(@) respectively. if the height of the building is 10 m find the distances between A and B correct to two decimal places

    A
    10 . 66 m
    B
    13 . 43 m
    C
    11 . 55 m
    D
    12 . 26 m

  • What will be the height of the building from a point 25 m away from the base of the building if the angle of elevation of the top of building from that point is 30^(@) ?

    A
    `25 sqrt""3m`
    B
    25m
    C
    `sqrt""3m`
    D
    `sqrt""3//25m`

  • From a point on the ground 100 m away from the base of a building, the angle of elevation of the top of the building is 60^(@) . Which of the following is the best approximation for the height of the building ?

    A
    172 m
    B
    173 m
    C
    174 m
    D
    175 m

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