Question

EXAMPLE 10 A bird is sitting on the top of a vertical pole 20 m high
and its elevation from a point 0 on the ground is 45°. It flies off
horizontally straight away from the point O. After one second, the
elevation of the bird from O is reduced to 30°. Then the speed (in
m/sec) of the bird is
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Answer 1

Answer:

50ms

Step-by-step explanation:

Because the elavation

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