Answer:
Option D is the correct answer.
Step-by-step explanation:
North and west are mutually perpendicular.
Resultant of two mutually perpendicular vectors a and b [tex]=\sqrt{a^2+b^2}[/tex]
Here a = 100 miles north and b = 200 miles west
Resultant displacement [tex]=\sqrt{100^2+200^2}=223.61 miles[/tex]
[tex]\texttt{Velocity = }\frac{\texttt{Displacement}}{\texttt{Time}}=\frac{223.61}{1}=223.61mph[/tex]
Velocity = 224 mph
Option D is the correct answer.