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A person standing on the ground observes the angle of elevation of the top of a tower to be `30^@` On walking a distance a in a certain direction, he finds the elevation of the top to be same as before. He then walks a distance `5/3 a` at right angles to his former direction, and finds that the elevation of the top has doubled. The height of the tower is

A

`sqrt(5/6)`a

B

`sqrt(5/(48))`a

C

`sqrt(6/5)a`

D

`sqrt(48/85)`a

Text Solution

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The correct Answer is:
A
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