At an Instant When a Particle of Mass 80 G

Multiple Choice

At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?

A) 16 m/s
B) 45 m/s
C) 23 m/s
D) 20 m/s
E) 36 m/s