The ball A of mass 4 kg moving with velocity 5 m/s is colliding with another ball B of mass 6 kg. Both the balls are moving in the same direction. Determine the velocity of ball B if both the balls start moving with a common velocity of 8 m/s after collision.

• A. 5 m/s
• B. 10 m/s
• C. 8 m/s
• D. 12 m/s