A flagstaff 5 m high stands on a building 25 m high. As observed from a point at a height of 30 m, the flagstaff a

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Q 3010180019.     A flagstaff 5 m high stands on a building 25 m high. As observed from a point at a height of 30 m, the flagstaff and the building subtend equal angles. The distance of the observer from the top of the flagstaff is
A

 \frac{5\sqrt{3}}{2}

B

5\sqrt{\frac{3}{2}}

C

5\sqrt{\frac{2}{3}}

D

None of these

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