greatwhiteshark
Full Member
- Joined
- May 8, 2005
- Messages
- 279
The navigator of a ship at sea has a harbor in sight at which the ship is to dock. She spots a lighthouse that she knows is 1 mile up the coast from the mouth of the harbor and she measures the angle between the line-of-sight observations of the harbor and lighthouse to be 20 degrees. With the ship heading directly toward the harbor, she repeast this measurement after 5 minutes of traveling at 12 mph. If the new angle is 30 degrees, how far is the ship from the harbor?