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Question

From the top of a lighthouse, the angle of depression to the top and bottom of a tower is 30° and 45°, respectively. If the lighthouse is 210 metres high, then find the height of the tower.

A 70(√3 – 1) metres

B 140√3(√3 – 1) metres

C 70√3(√3 – 1) metres

D 140(√3 – 1) metres

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