A B is a vertical pole with B at the ground level 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^{\circ}. He moves away from the pole along the line B C to a point D such that C D=7 {\m}. From D the angle of elevation of the point A is 45^{\circ}. Then the height of the pole is [AIEEE 2008]

Correct Answer is : 7√32(√3+1)m

{7 \sqrt{3}}/{2} {1}/{\sqrt{3-1}} m

{7 \sqrt{3}}/{2} {1}/{\sqrt{3+1}} m

AIEEE 2008 Solved Paper

Section: Mathematics

Question : 84 of 104

Marks: +1, -0

AB is a vertical pole with B at the ground level 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=7m. From D the angle of elevation of the point A is 45∘. Then the height of the pole is

[AIEEE 2008]

‌
7√3
2
‌
1
√3−1
m
‌
7√3
2
(√3+1)m
‌
7√3
2
(√3−1)m
‌
7√3
2
‌
1
√3+1
m

Validate

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