A bird is flying at a height of 30 m above the ground. The angle of elevation of the bird from an observer is 30∘. Find the distance(in meters), between the observer and the bird.
A
60
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B
40
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C
30
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D
20√3
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Solution
The correct option is A
60
The given situation can be represented by the figure below. In the given right-angled triangle, sin30∘=ABAC⇒AC=ABsin30∘=3012=60m ∴Thedistancebetweenthebirdandtheobserveris60m.