A plane is flying horizontally with speed 120/.ms Its angle of elevation from a point on ground is 60° . After 20s angle of elevation is 30°. Find height of plane
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Step-by-step explanation:
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Answer:
Step-by-step explanation:
tan60
∘
=
x
3000
3
x=
3
3000
3
=3000m
tan30
∘
=
1/
3
3000
3
=9000m
distance covered = 9000- 3000
= 6000 m.
speed =
30
6000
=200m/s
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