A lighthouse stands 550 m off a straight shore and the focused beam of its light revolves five times each minute. As shown in the figure, P is the point on shore closest to the lighthouse and Q is a point on the shore 300 m from P. What is the speed of Lighthouse . the beam along the shore when it strikes the point Q? 550 m - 300 m Let x be the distance along the shore from point P to the beam and let 0 be the angle through which the light revolves. Write an equation that relates x and 0. Find the related rates equation. dx de at When the beam strikes the point Q, its speed along the shore is about (Do not round until the final answer. Then round to the nearest integer as n m2/ min. m / min. - m / min. m