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Question

From the top of a tower, the angle of depression of a car on the ground is 30°. After the car moves 40 m towards the tower in a straight line, the angle of depression becomes 45°. Find the height of the tower.

A 10(√3 + 1)

B 20(√3 + 1)

C 12(√2 + 1)

D 13(√3 + 5)

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