The angle of elevation of the to of a to...

The angle of elevation of the to of a tower from a point A on the ground is `30^(@)`. On moving a distance of 20 meters towards the foot of the tower to a point B, the angle of elevation increases to `60^(@)`. What is the height of the tower ?

`sqrt(3)` m

`5sqrt(3)` m

`10sqrt(3)` m

`20sqrt(3)` m

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LUCENT PUBLICATION-HEIGHT AND DISTANCE-EXERCISE-12A

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