An Airplane Traveling North at 400 M/s Is Accelerated Due

Multiple Choice

An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s² for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane?

A) 300 m/s
B) 400 m/s
C) 500 m/s
D) 700 m/s
E) 800 m/s