MDRS MACHINA/CLASS 10/SOME APPLICATIONS OF TRIGONOMETRY
some applications of trigonometry
exercise 12.1
question
14. A 1.2 m tall girl spots a balloon moving
with the wind in a horizontal line at a
height of 88.2 m from the ground. The
angle of elevation of the balloon from
the eyes of the girl at any instant is
60°. After some time, the angle of
elevation reduces to 30° (see Fig.
12.13). Find the distance travelled by
the balloon during the interval.