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12mtallgirlspotsaballoonmovingth the wind in a horizontal line at aight of 88.2 m from the ground. Theele of elevation of the balloon fromes of the girl at any instant iswanu)|n tall girl spots a balloon movinggroundWhiwhich sih theevadistanetervale stringAfter some time, the angle ofelevation reduces to 30 (see Fig 9.13)Find the distance travelled by theas he waalloon during the interval.

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