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Question

From a point on the ground, the angle of elevation of the top of a tower is 45°. On walking 20 m towards the tower, the angle of elevation becomes 60°. Find the height of the tower.

A 17(3 + √3) m

B 10(5 + √3) m

C 10(3 + √3) m

D 10(2 + √2) m

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