Two Vehicles Approach a Right Angle Intersection and Then Collide

Multiple Choice

Two vehicles approach a right angle intersection and then collide.After the collision,they become entangled.If their mass ratios were 1: 4 and their respective speeds as they approached were both 13 m/s,find the magnitude and direction of the final velocity of the wreck.

A) 13.1 m/s at 79°
B) 16.3 m/s at 79°
C) 12.5 m/s at 79°
D) 15.7 m/s at 79°