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Question

The angle of elevation of the top of a tower at a point on level ground is 45°. When moved 20 m towards the tower, the angle of elevation becomes 60°. What is the height of the tower?

A 10(3–√−1)10(3−1) m

B 10(3–√+1)10(3+1) m

C 10(3−3–√)10(3−3) m

D 10(3+3–√)10(3+3) m

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