Question

a window in a biulding is at aheight of 10 meter from ground the angle of depression of a point D
on the ground from the window is 30 degree the angle of elevation of the top of the building from the point P is 60 degree. find the height of the biulding?

Answer 1

let AP be the building  .and CD be the window.
of height 10 m.
in triangle CPD
 tan 30 = 10 /bb = 10 root3 m.
in triangle DAP,
tan 60 = x / 10 root3
30 = x
the height of the building is 30 m.