Asked by Cute girl
From a point P on the ground the angles of elevation of the top of the building and of a helicopter, hovering at some height over the top of the building, are 30 degree and 60 degree, respectively. Find the height of the helicopter above the ground
Answers
Answered by
Steve
draw a diagram.
If the building has height h, and
the chopper is x above the building
h cot60° = (h+x)cot30°
Both of these are equal to the distance of P from the building. Once you have that, you can find h and x.
Without knowing that or h, you cannot find x.
If the building has height h, and
the chopper is x above the building
h cot60° = (h+x)cot30°
Both of these are equal to the distance of P from the building. Once you have that, you can find h and x.
Without knowing that or h, you cannot find x.
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