Answer
$v=\frac{72\pi}{5}$ cm per sec
Work Step by Step
Step 1: The formula to be used here is $v=rw$.
Step 2: After substituting the values of $r$ and $w$ provided by the question into this formula, the equation becomes $v=8\times\frac{9\pi}{5}$
Step 3: Solving, $v=\frac{72\pi}{5}$ cm per sec