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A 1.2 m tall girl spots a balloon movingwith the wind in a horizontal line at aheight of 88.2 m from the ground. Theangle of elevation of the balloon fromthe eyes of the girl at any instant is 60° .After some time, the angle of elevationreduces to 30° (see Fig. 9.14). Find thedistance travelled by the balloonduring the interval. |
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