Answer
The average velocity with the greatest magnitude is for the displacement ending at point $B$.
$| \vec{v}_{avg,AB}|=0.11$ m/s
Work Step by Step
(c)
(Calculations done in part (a))
$| \displaystyle \vec{v}_{avg,AB}|=0.11$ m/s
$| \displaystyle \vec{v}_{avg,AC}|= 0.0083$ m/s
$| \vec{v}_{avg,AD}|=0.07$ m/s
The average velocity with the greatest magnitude is for the displacement ending at point $B$.
$| \vec{v}_{avg,AB}|=0.11$ m/s
