Given parameters: 
Displacement of the seagull = 145m to the east
Time taken to cover the distance = 10s 
Unknown: 
Velocity = ? 
Solution: 
Velocity is one of the physical quantities. It is the speed in a specific direction. Hence, velocity is a vector quantity having both magnitude and direction. 
 So, mathematically; 
 Velocity = 
 
 
 Velocity = 
 = 14.5m/s due east
 = 14.5m/s due east
The velocity of the seagull is 14.5m/s due east