1.

As observed from the of a lighthouse, 120√3 m above the sea level, the angle of depression of a ship sailing towards it changes from 30° to 60°. The distance travelled by ship during the period of observation is:

A. 180√3 m
B. 180 m
C. 240 m
D. 240√3 m
Answer» D. 240√3 m


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