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AB is a vertical pole with B at the grou...

AB is a vertical pole with B at the ground level and and A at the top .A man finds that the angle of elevation of the point A from a certain point C on the ground is `60^(@)` . He moves away from the pole along the line BC to a point D such that CD = 7 m .From D . the angle of elevation of the point A is `45^(@)` .Find the height of the pole .

A

`(7sqrt(3))/(2)(1)/(sqrt(3)+1)m`

B

`(7sqrt(3))/(2)(1)/(sqrt(3)-1)m`

C

`(7sqrt(3))/(2)(sqrt(3)+1)m`

D

`(7sqrt(3))/(2)(sqrt(3)-1)m`

Text Solution

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The correct Answer is:
C
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