Find the Length of an Arc of a Circle of Radius

Multiple Choice

Find the length of an arc of a circle of radius $3$ m if the arc subtends a central angle of $75 ^ { \circ }$

A) $s = \frac { 5 \pi } { 4 } \mathrm { ft }$

B) $s = 25 \pi \mathrm { ft }$

C) $s = \frac { 3 \pi } { 8 } \mathrm { ft }$

D) $s = \frac { 9 \pi } { 4 } \mathrm { ft }$

E) $s = 5 \mathrm { ft }$