The length of the curved border or arc is 7.5 yards.
the length of the arc = [tex]\theta \times r[/tex]
given that [tex]\theta[/tex] = 1.5 radian
radius = 5 yards
then the length of arc from the above formula
[tex]l = \theta \times r\\l = 1.5 \times 5 = 7.5[/tex] yards
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