## PRACTICE PROBLEM SET 12
Now try these problems on your own. The answers are in Chapter 23, starting on page 504.
6. A boat is being pulled toward a dock by a rope attached to its bow through a pulley on the dock 7 feet above the bow. If the rope is hauled in at a rate of 4ft/sec, how fast is the boat approaching the dock when 25 ft of rope is out?