Here is the extracted text: "3) A ship sailing at a point P is watching the lighthouse, which makes an angle of elevation of 30° from the ship. The ship sails some distance towards the lighthouse and the new angle from its top and the angle of elevation becomes 60°. What is the distance between the base of the lighthouse and the point P? a) 43 units b) 8 units c) 12 units d) Data inadequate e) None of these"