Answer:
arc = 7.5π units
Step-by-step explanation:
the arc length is calculated as
arc = circumference of circle × fraction of circle
the angle subtended at the centre by the arc is 360° - 90° = 270° , then
arc = 2π × 5 × [tex]\frac{270}{360}[/tex]
= 10π × [tex]\frac{3}{4}[/tex]
= [tex]\frac{30\pi }{4}[/tex]
= 7.5π
