At 6:00 A.M., a fighter plane took off at 410 kph from an aircraft carrier, maintaining the direction of N 50° E.

At 6:00 A.M., a fighter plane took off at 410 kph from an aircraft carrier, maintaining the direction of N 50° E. The carrier kept on moving due south at 28 kph. At 7:30 A.M., the communication between the plane and the carrier was lost. What was the communication range in km?