From the top of a lighthouse 70 {\m} high with its base at sea level, the angle of depression of a boat is 15^{\circ}. The distance of the boat from the foot of the lighthouse is :

Correct Answer is : 70(2+√3)m

UPSC NDA 2 2012 Mathematics Paper

Question : 40 of 120

Marks: +1, -0

From the top of a lighthouse 70m high with its base at sea level, the angle of depression of a boat is 15∘. The distance of the boat from the foot of the lighthouse is :

70(2−√3)m
70(2+√3)m
70(3−√3)m
70(3+√3)m

Validate

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