Mathematics, 20.10.2020 14:01 laniyasontee

A 1.2m tall girl spots a balloon moving with wind in a horizontal line at a height of 88.2m 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. 9.13).
Find the distance travelled by the
balloon during the interval.

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