Question

A window in a building is at a height of 10m 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 the building from the point P is 60 degree .Find the height of the building?

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 = xthe height of the building is 30 m.
HOPE THIS HELPS..