A 1.2 m tall girl spots a balloon moving withthe wind in a horizontal line at a height of88.2 m from the ground. The angle of eleva-tion of the balloon from the eyes of the girlat any instant is 60. After some time, theangle of elevation reduces to 30. Find thedistance travelled by the balloon during theinterval.

A 1.2 m tall girl spots a balloon moving withthe wind in a horizontal

1.	A 1.2 m tall girl spots a balloon moving withthe wind in a horizontal line at a height of88.2 m from the ground. The angle of eleva-tion of the balloon from the eyes of the girlat any instant is 60. After some time, theangle of elevation reduces to 30. Find thedistance travelled by the balloon during theinterval.
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