A lighthouse stands 600m off a straight shore and the focused loseam of its light semarrevolves three times each minute. As shore shown in the figure, P is the point closet to the light house and 2 is point the shore 350 m from P. What is the speed of the beam along the shore when it strikes the point Q ? Describe how the speed of the beam along the shore varies with the distance betwee P and Q. Neglect the height of the lighthouse ак 350m 600m a

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