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A vertical tower stands on a horizontal plane and surmounted by a flagstaff of height 'h'. At a point on the plane. The angle of elevation of bottom of the flagstaff is `alpha` and that of the top of the flagstaffis `beta`. Find the height of the tower :

A

`h tan alpha`

B

`(htanalpha)/(tanbeta-tanalpha)`

C

`(h tanalpha)/(tanalpha-tanbeta)`

D

None of these

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Verified by Experts

The correct Answer is:
B
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ARIHANT PUBLICATION BIHAR-HEIGHT AND DISTANCE-EXAM BOOSTER (FOR CARCKING EXAM)
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