Answer
Arc Length : $\dfrac{15 \pi}{2} ft=23.56$ feet
Work Step by Step
Since, $ s= r \theta $
The length of the arc of the circle is given by: $ 2 \pi r \times \dfrac{\theta}{360^{\circ}}$
Here, arc length is: $ 2 \pi r \times 10 \times \dfrac{135^{\circ}}{360^{\circ}} =\dfrac{15 \pi}{2}$ feet
