A helicopter travels directly from its base to a ship at anchor located some distance away. Using a 2-dimensional coordinate system, with the base at the origin, the ship has coordinates (x, y) =(91,66), in km. On the return trip, traffic control forces the helicopter to fly first to `B', located at (x, y)=(73,16) km and then to its base. Calculate the distance from the helicopter base to the ship. Required:
Calculate how much farther the helicopter travels on the return trip.