A bird is sitting on the top of a tree, which is 80 m high. The angle of elevation of tground is 459. The bird flies away from the point of observation horizontally and rem a2seconds, the angle of elevation of the bird from the point of observation becomes 300mains at a constant height. Afteres 30°. Find the speed of flyingof the bird.

A bird is sitting on the top of a tree, which is 80 m high. The angle

1.	A bird is sitting on the top of a tree, which is 80 m high. The angle of elevation of tground is 459. The bird flies away from the point of observation horizontally and rem a2seconds, the angle of elevation of the bird from the point of observation becomes 300mains at a constant height. Afteres 30°. Find the speed of flyingof the bird.
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