A boat is pulled into a dock by means of a rope attached to a pulley on the dock (see the accompanying figure). The rope is attached to the bow of the boat at a point 10 ft below the pulley. If the rope is pulled through the pulley at a rate of 20 ft at what rate will the boat be min approaching the dock when 150 ft of rope is out? NOTE: Enter the exact answer. Pulley Boat

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