Answer:
C. 25/18 pi units
Step-by-step explanation:
A unit circle is a circle of radius 1 unit.
Length of an arc = central angle / 360° × 2πr
where r = radius = 1 unit and central angle = 250°
Length of an arc = 250/360 × 2π ×1
= 25/36 × 2π
Length of an arc = 25/18π units
