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 3 years ago
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 ontenth of metre.
Can someone please explain, I'm so lost xD
 3 years ago
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 ontenth of metre. Can someone please explain, I'm so lost xD

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Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0Do i work it out by soh cah toa ?

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0Okay, btw I asked the question before and someone drew a different diagram to yours xD

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2this problem is 3 dimensionaldw:1316171303379:dw

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2from 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

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2the first 2 diagrams are 2 dimensional and the 3rd figure is an overhead view

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1316171761134:dw Is this right as well ?>

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2but the two lines below are inclined at 90 degrees to each other in the 3rd dimension

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2the 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)

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0So the figure I drew was wrong ?:

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1316172253129:dw

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2the above figure is possible only in 3d

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2no no u don't need 3d trig. just consider each triangle at one time to get the required variables

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0Okay, but is it necessary though to draw it ?

abhinayreddy
 3 years ago
Best ResponseYou've already chosen the best response.2the 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
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