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 ofelevation reduces to 30° (see Fig. 9.13). Find the distance travelled by theballoon during the interval.
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Негізгі бет 14. A 1.2 m tall girl spots a balloon moving with the wind in a horizontal line at a height of 88.
Пікірлер: 19