JEE Main 2008 Mathematics question
Not in JEE syllabus
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 = 7 m. From D the angle of elevation of the point A is 45°. Then the height of the pole is
Answer: (2)
Solution
Let BC = x, height h: and . So
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