19. As observed from the top of a lighthouse, 100 m above sea level, t – InterviewSolution

1.	19. As observed from the top of a lighthouse, 100 m above sea level, theangle of depression of a ship, sailing directly towards it, changes from30° to 600. Determine the distance travelled by the ship during the[CBSE 2004, '08C]period of observation. [Use
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