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A flag staff of 5m high stands on a buil...

A flag staff of 5m high stands on a building of 25m high. At an observer at a height of 30 m. The flag staff and the building subtend equal angles . The distance of the observer from the top of the flag staff is

A

5m

B

`5sqrt(3)m`

C

`5sqrt(3//2)m`

D

None of these

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The correct Answer is:
C
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