From top of a lighthouse 120 {\m} above the sea, the angle of depression of a boat is 15^{\circ}. What is the distance of the boat from the lighthouse?

UPSC NDA II 2010 Mathematics Paper

Question : 16 of 120

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From top of a lighthouse 120m above the sea, the angle of depression of a boat is 15∘. What is the distance of the boat from the lighthouse?

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