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Mimi_x3 Group Title

An electricity tower is h metres high. The elevation angles of the tower from Aaron and Kevin are respectively 45° and 30° . On the ground, relative to the tower the bearings of Aaron and Kevin are respectively SW and SE. If the boys are 50m apart, find the height h of the tower to the nearest on-tenth of metre. Can someone please explain, I'm so lost xD

  • 3 years ago
  • 3 years ago

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  1. Mimi_x3 Group Title
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    idk

    • 3 years ago
  2. raheen Group Title
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    oh

    • 3 years ago
  3. Mimi_x3 Group Title
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    Do i work it out by soh cah toa ?

    • 3 years ago
  4. raheen Group Title
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    I'll try it

    • 3 years ago
  5. Mimi_x3 Group Title
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    Okay, btw I asked the question before and someone drew a different diagram to yours xD

    • 3 years ago
  6. raheen Group Title
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    really?

    • 3 years ago
  7. abhinayreddy Group Title
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    this problem is 3 dimensional|dw:1316171303379:dw|

    • 3 years ago
  8. raheen Group Title
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    you are right.

    • 3 years ago
  9. Mimi_x3 Group Title
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    Is it 3D ?

    • 3 years ago
  10. abhinayreddy Group Title
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    from first two diagrams we get AT = h and KT = \[h \sqrt{3}\] so from 3rd figure AT2 + KT2 = 2500 so on simplifying h = 25 m

    • 3 years ago
  11. abhinayreddy Group Title
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    the first 2 diagrams are 2 dimensional and the 3rd figure is an overhead view

    • 3 years ago
  12. Mimi_x3 Group Title
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    ohh I get it tyvm (:

    • 3 years ago
  13. Mimi_x3 Group Title
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    |dw:1316171761134:dw| Is this right as well ?>

    • 3 years ago
  14. abhinayreddy Group Title
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    but the two lines below are inclined at 90 degrees to each other in the 3rd dimension

    • 3 years ago
  15. Mimi_x3 Group Title
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    So its wrong ?

    • 3 years ago
  16. abhinayreddy Group Title
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    the figure is somewhat like .... try cutting a pyramid with a square base from one corner of base to it's opposite corner symmetrically. then u get a figure similar to what we need (not exactly similar but good enough to understand the above problem)

    • 3 years ago
  17. Mimi_x3 Group Title
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    So the figure I drew was wrong ?:

    • 3 years ago
  18. abhinayreddy Group Title
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    |dw:1316172253129:dw|

    • 3 years ago
  19. Mimi_x3 Group Title
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    oh 3D trig ?

    • 3 years ago
  20. abhinayreddy Group Title
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    the above figure is possible only in 3d

    • 3 years ago
  21. Mimi_x3 Group Title
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    it can be in 3D ?

    • 3 years ago
  22. abhinayreddy Group Title
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    no no u don't need 3d trig. just consider each triangle at one time to get the required variables

    • 3 years ago
  23. Mimi_x3 Group Title
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    Okay, but is it necessary though to draw it ?

    • 3 years ago
  24. abhinayreddy Group Title
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    the whole point is to test whether u can imagine the required diagram once u get the diagram it is easy simplification. u can see that i used the first two diagrams to get the values of AT and KT in terms of h and then used pythagoras theorem in the final triangle. drawing the diagram is important unless u can visualize it exactly to solve the problem in ur head

    • 3 years ago
  25. Mimi_x3 Group Title
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    Okay tyvm (:

    • 3 years ago
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